Comparison Display

MEASURAND Amount-of-substance fraction of Carbon dioxide in low calorific value natural gas

NOMINAL VALUE 4 cmol/mol

GAS MIXTURE: Expressed in cmol/mol: Nitrogen: 12, Carbon dioxide: 4, Helium: 0.5, Hydrogen: 3, Ethane: 0.75, Propane: 0.3, iso-Butane: 0.2, n-Butane: 0.2, iso-Pentane: 0.05, n-Pentane: 0.05, neo-Pentane: 0.05, n-Hexane: 0.05, Methane: 78.85

Degrees of equivalence represented by D_i = (x_I - x_R) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

CO2

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of Ethane in low calorific value natural gas

NOMINAL VALUE 0.75 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 12, Carbon dioxide: 4, Helium: 0.5, Hydrogen: 3, Ethane: 0.75, Propane: 0.3, iso-Butane: 0.2, n-Butane: 0.2, iso-Pentane: 0.05, n-Pentane: 0.05, neo-Pentane: 0.05, n-Hexane: 0.05, Methane: 78.85

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,icomputed from the largest consistent subset (LCS) of the submitted results x_i, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report.

KCRVs for ethane: The consensus value computed from the LCS is 0.74501 cmol/mol, with standard uncertainty 0.00040 cmol/mol. The excess standard deviation τ is 0.00056 cmol/mol (0.08 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

Participant

D_i / cmol/mol

Participating institutes

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MEASURAND To add measurand

NOMINAL VALUE To add nominal value

Degrees of equivalence represented by D_i = (x_I - x_R) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in (unit).

Participant

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of Hydrogen in low calorific value natural gas

NOMINAL VALUE 3 cmol/mol

KCRVs for hydrogen: The consensus value computed from the LCS is 3.0007 cmol/mol, with standard uncertainty 0.0029 cmol/mol. The excess standard deviation τ is 0.0046 cmol/mol (0.15 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Hydrogen

D_i / cmol/mol

Participating institutes

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CCQM-K118

MEASURAND Amount-of-substance fraction of Methane in low calorific value natural gas

NOMINAL VALUE 78.85 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Participant

D_i / cmol/mol

Participating institutes

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CCQM-K118

MEASURAND Amount-of-substance fraction of iso-Butane in low calorific value natural gas

NOMINAL VALUE 0.2 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Participant

D_i / cmol/mol

Participating institutes

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CCQM-K118

MEASURAND Amount-of-substance fraction of iso-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Participant

D_i / cmol/mol

Participating institutes

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CCQM-K118

MEASURAND Amount-of-substance fraction of n-Butane in low calorific value natural gas

NOMINAL VALUE 0.2 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Participant

D_i / cmol/mol

Participating institutes

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CCQM-K118

MEASURAND Amount-of-substance fraction of neo-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Participant

D_i / cmol/mol

Participating institutes

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CCQM-K118

MEASURAND Amount-of-substance fraction of n-Hexane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Participant

D_i / cmol/mol

Participating institutes

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CCQM-K118

MEASURAND Amount-of-substance fraction of Propane in low calorific value natural gas

NOMINAL VALUE 0.3 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Participant

D_i / cmol/mol

Participating institutes

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CCQM-K118

MEASURAND Amount-of-substance fraction of Helium in low calorific value natural gas

NOMINAL VALUE 0.5 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Participant

D_i / cmol/mol

Participating institutes

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CCQM-K118

MEASURAND Amount-of-substance fraction of n-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Participant

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of Methane in high calorific (LNG) natural gas

NOMINAL VALUE 87.52 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Methane

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of Carbon dioxide in high calorific (LNG) natural gas

NOMINAL VALUE 0.02 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Carbon dioxide

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of Nitrogen in high calorific (LNG) natural gas

NOMINAL VALUE 0.12 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in (cmol/mol).

Nitrogen

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of Propane in high calorific (LNG) natural gas

NOMINAL VALUE 2 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Propane

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of Ethane in high calorific (LNG) natural gas

NOMINAL VALUE 10 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Ethane

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of iso-Pentane in high calorific (LNG) natural gas

NOMINAL VALUE 0.02 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

iso-Pentane

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of n-Pentane in high calorific (LNG) natural gas

NOMINAL VALUE 0.02 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

n-Pentane

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of n-Butane in high calorific (LNG) natural gas

NOMINAL VALUE 0.15 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

n-Butane

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of iso-Butane in high calorific (LNG) natural gas

NOMINAL VALUE 0.15 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

iso-Butane

D_i / cmol/mol

Participating institutes

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MEASURAND Amount-of-substance fraction of Carbon dioxide in low calorific value natural gas

NOMINAL VALUE 4 cmol/mol

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.0003	0.0092
VNIIM	-0.0145	0.0140
SMU	-0.0028	0.0180
NIM	-0.0058	0.0123
NPL	-0.0022	0.0092
NMIA	0.0016	0.0087
BAM	-0.0040	0.0104
GUM	0.0136	0.0254
CMI	0.0007	0.0108
NMISA	1.7086	0.1195
NMIJ	0.0981	0.0195
KRISS	-0.0187	0.0117
UME	0.0076	0.0117

Participating institutes

CCQM-K118a

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MEASURAND Amount-of-substance fraction of Ethane in low calorific value natural gas

NOMINAL VALUE 4 cmol/mol

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	-0.0006	0.0025
VNIIM	-0.0017	0.0046
SMU	0.0009	0.0030
NIM	-0.0002	0.0028
NPL	0.0007	0.0025
NMIA	0.0005	0.0024
BAM	-0.0003	0.0038
GUM	0.0058	0.0064
CMI	0.0013	0.0039
NMISA	-0.0036	0.0189
NMIJ	-0.0006	0.0022
KRISS	-0.0042	0.0033
UME	-0.0003	0.0025

Participating institutes

CCQM-K118

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MEASURAND Amount-of-substance fraction of Nitrogen in low calorific value natural gas

NOMINAL VALUE 12 cmol/mol

KCRVs for nitrogen: The consensus value computed from the LCS is 11.985 cmol/mol, with standard uncertainty 0.006 cmol/mol. The excess standard deviation τ is 0.008 cmol/mol (0.07 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	-0.004	0.029
VNIIM	-0.044	0.040
SMU	-0.007	0.043
NIM	-0.019	0.037
NPL	-0.013	0.032
NMIA	-0.012	0.027
BAM	-0.004	0.027
GUM	0.040	0.055
CMI	0.008	0.030
NMISA	-0.022	0.082
NMIJ	-0.015	0.063
KRISS	-0.073	0.036
UME	0.022	0.036

Participating institutes

CCQM-K118

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MEASURAND Amount-of-substance fraction of Hydrogen in low calorific value natural gas

NOMINAL VALUE 3 cmol/mol

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	-0.0011	0.0145
VNIIM	-0.0087	0.0190
SMU	0.0082	0.0348
NIM	0.0007	0.0158
NPL	-0.0016	0.0204
NMIA	0.0094	0.0148
BAM	0.0025	0.0144
GUM	-0.0031	0.0277
CMI	-0.0222	0.0241
NMISA	0.0100	0.1275
NMIJ	-0.0854	0.0193
KRISS	-0.0191	0.0151
UME	0.0062	0.0145

Participating institutes

CCQM-K118

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CCQM-K118

MEASURAND Amount-of-substance fraction of Methane in low calorific value natural gas

NOMINAL VALUE 78.85 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	-0.15	0.10
VNIIM	0.04	0.08
SMU	0.00	0.14
NIM	0.01	0.07
NPL	0.01	0.07
NMIA	-0.01	0.08
BAM	0.00	0.06
GUM	-0.06	0.10
CMI	-0.01	0.07
NMISA	-0.43	1.62
NMIJ	0.09	0.34
KRISS	0.11	0.10
UME	-0.02	0.17

Participating institutes

Methane

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CCQM-K118

MEASURAND Amount-of-substance fraction of iso-Butane in low calorific value natural gas

NOMINAL VALUE 0.2 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	-0.00004	0.00042
VNIIM	-0.00048	0.00154
SMU	0.00010	0.00116
NIM	0.00008	0.00062
NPL	-0.00006	0.00079
NMIA	0.00008	0.00054
BAM	0.00000	0.00041
GUM	0.00718	0.00174
CMI	-0.00011	0.00145
NMIJ	-0.00028	0.00050
KRISS	-0.00089	0.00070
UME	0.00036	0.00055

Participating institutes

iso-Butane

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CCQM-K118

MEASURAND Amount-of-substance fraction of iso-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	-0.00005	0.00032
VNIIM	0.00003	0.00058
SMU	-0.00013	0.00052
NIM	-0.00001	0.00035
NPL	-0.00002	0.00035
NMIA	0.00025	0.00032
BAM	0.00000	0.00032
GUM	-0.00009	0.00058
CMI	0.00007	0.00042
NMIJ	-0.00048	0.00030
KRISS	-0.00049	0.00150
UME	-0.00014	0.00032

Participating institutes

iso-Pentane

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CCQM-K118

MEASURAND Amount-of-substance fraction of n-Butane in low calorific value natural gas

NOMINAL VALUE 0.2 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.0003	0.0006
VNIIM	-0.0006	0.0017
SMU	0.0003	0.0012
NIM	-0.0002	0.0007
NPL	0.0000	0.0009
NMIA	0.0000	0.0007
BAM	-0.0002	0.0006
GUM	0.0005	0.0017
CMI	0.0000	0.0016
NMISA	0.0001	0.0047
NMIJ	-0.0008	0.0006
KRISS	-0.0014	0.0008
UME	-0.0001	0.0007

Participating institutes

n-Butane

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CCQM-K118

MEASURAND Amount-of-substance fraction of neo-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.00005	0.00026
VNIIM	-0.00006	0.00039
SMU	0.00033	0.00056
NIM	-0.00002	0.00029
NPL	-0.00005	0.00035
NMIA	-0.00006	0.00029
BAM	0.00008	0.00027
GUM	0.00011	0.00102
CMI	0.00037	0.00056
NMIJ	-0.00016	0.00028
KRISS	-0.00021	0.00101
UME	-0.00030	0.00028

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CCQM-K118a

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CCQM-K118

MEASURAND Amount-of-substance fraction of n-Hexane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	-0.00014	0.00032
VNIIM	0.00009	0.00067
SMU	0.00001	0.00049
NIM	0.00000	0.00033
NPL	0.00013	0.00036
NMIA	-0.00011	0.00086
BAM	-0.00008	0.00034
GUM	0.00023	0.00042
CMI	0.00021	0.00043
NMISA	0.00044	0.00121
NMIJ	-0.00032	0.00031
KRISS	-0.00050	0.00103
UME	-0.00013	0.00037

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n-Hexane

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CCQM-K118

MEASURAND Amount-of-substance fraction of Propane in low calorific value natural gas

NOMINAL VALUE 0.3 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.0001	0.0013
VNIIM	-0.0007	0.0019
SMU	0.0004	0.0018
NIM	-0.0002	0.0012
NPL	0.0000	0.0010
NMIA	0.0000	0.0011
BAM	-0.0001	0.0014
GUM	-0.0006	0.0026
CMI	0.0015	0.0016
NMISA	0.0002	0.0072
NMIJ	-0.0004	0.0010
KRISS	-0.0018	0.0013
UME	0.0004	0.0011

Participating institutes

Propane

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CCQM-K118

MEASURAND Amount-of-substance fraction of Helium in low calorific value natural gas

NOMINAL VALUE 0.5 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.00062	0.00200
VNIIM	-0.00174	0.00304
SMU	-0.00003	0.00568
NIM	-0.00072	0.00222
NPL	0.00103	0.00305
NMIA	-0.00038	0.00204
BAM	0.00032	0.00187
GUM	-0.00126	0.00347
CMI	0.00199	0.00463
NMISA	0.01006	0.02848
NMIJ	-0.00625	0.00237
KRISS	-0.00395	0.00228
UME	0.00625	0.00224

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Helium

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CCQM-K118

MEASURAND Amount-of-substance fraction of n-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.0001	0.0003
VNIIM	-0.0001	0.0005
SMU	0.0001	0.0004
NIM	-0.0001	0.0003
NPL	0.0000	0.0003
NMIA	0.0000	0.0003
BAM	0.0001	0.0003
GUM	0.0004	0.0004
CMI	-0.0001	0.0004
NMISA	0.0001	0.0012
NMIJ	-0.0001	0.0003
KRISS	-0.0006	0.0013
UME	0.0000	0.0003

Participating institutes

n-Pentane

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MEASURAND Amount-of-substance fraction of Methane in high calorific (LNG) natural gas

NOMINAL VALUE 87.52 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	-0.020	0.097
VNIIM	0.032	0.064
NIM	-0.006	0.050
NPL	0.004	0.053
NMIA	-0.019	0.064
BAM	0.002	0.042
GUM	0.003	0.097
CMI	0.018	0.048
NMISA	-0.412	1.625
BFKH	-0.016	0.049
NMIJ	-0.363	0.276
UME	-0.010	0.075

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CCQM-K118b

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MEASURAND Amount-of-substance fraction of Carbon dioxide in high calorific (LNG) natural gas

NOMINAL VALUE 0.02 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.00006	0.00019
VNIIM	-0.00007	0.00022
NIM	-0.00013	0.00019
NPL	-0.00005	0.00043
NMIA	-0.00011	0.00034
BAM	0.00005	0.00018
GUM	-0.00004	0.00017
CMI	0.00004	0.00026
NMISA	-0.00127	0.00135
BFKH	-0.00009	0.00026
NMIJ	0.00014	0.00017
UME	0.00009	0.00020

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CCQM-K118b

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MEASURAND Amount-of-substance fraction of Nitrogen in high calorific (LNG) natural gas

NOMINAL VALUE 0.12 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.0002	0.0018
VNIIM	-0.0014	0.0018
NIM	0.0031	0.0019
NPL	-0.0001	0.0017
NMIA	0.0001	0.0018
BAM	0.0004	0.0018
GUM	-0.0016	0.0017
CMI	-0.0022	0.0019
NMISA	-0.0008	0.0090
BFKH	-0.0005	0.0018
NMIJ	0.0016	0.0018
UME	0.0010	0.0016

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CCQM-K118b

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MEASURAND Amount-of-substance fraction of Propane in high calorific (LNG) natural gas

NOMINAL VALUE 2 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	-0.0004	0.0040
VNIIM	-0.0082	0.0115
NIM	-0.0019	0.0061
NPL	-0.0011	0.0045
NMIA	-0.0009	0.0047
BAM	-0.0003	0.0041
GUM	-0.0130	0.0086
CMI	0.0073	0.0066
NMISA	-0.0075	0.0449
BFKH	0.0008	0.0040
NMIJ	0.0160	0.0045
UME	0.0004	0.0039

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CCQM-K118b

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MEASURAND Amount-of-substance fraction of Ethane in high calorific (LNG) natural gas

NOMINAL VALUE 10 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.001	0.015
VNIIM	-0.027	0.051
NIM	-0.011	0.025
NPL	0.002	0.023
NMIA	0.000	0.012
BAM	0.001	0.017
GUM	-0.004	0.081
CMI	-0.039	0.023
NMISA	-0.035	0.229
BFKH	0.007	0.017
NMIJ	-0.011	0.017
UME	0.003	0.014

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CCQM-K118b

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MEASURAND Amount-of-substance fraction of iso-Pentane in high calorific (LNG) natural gas

NOMINAL VALUE 0.02 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.00000	0.00014
VNIIM	0.00007	0.00023
NIM	-0.00002	0.00014
NPL	0.00005	0.00014
NMIA	0.00019	0.00014
BAM	-0.00002	0.00013
GUM	-0.00036	0.00023
CMI	0.00029	0.00016
NMISA	-0.00020	0.00058
BFKH	0.00020	0.00016
NMIJ	-0.00035	0.00013
UME	0.00050	0.00013

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CCQM-K118b

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MEASURAND Amount-of-substance fraction of n-Pentane in high calorific (LNG) natural gas

NOMINAL VALUE 0.02 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.00002	0.00012
VNIIM	0.00001	0.00017
NIM	-0.00009	0.00012
NPL	0.00001	0.00012
NMIA	0.00004	0.00014
BAM	0.00001	0.00010
GUM	0.00005	0.00015
CMI	-0.00020	0.00014
NMISA	-0.00011	0.00041
BFKH	0.00002	0.00014
NMIJ	-0.00011	0.00012
UME	0.00024	0.00011

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CCQM-K118b

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MEASURAND Amount-of-substance fraction of n-Butane in high calorific (LNG) natural gas

NOMINAL VALUE 0.15 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	0.00004	0.00044
VNIIM	-0.00044	0.00156
NIM	-0.00036	0.00057
NPL	-0.00005	0.00067
NMIA	0.00004	0.00073
BAM	-0.00032	0.00045
GUM	-0.00083	0.00127
CMI	0.00041	0.00108
NMISA	0.00385	0.00359
BFKH	0.00017	0.00058
NMIJ	-0.00044	0.00053
UME	0.00004	0.00046

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CCQM-K118b

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MEASURAND Amount-of-substance fraction of iso-Butane in high calorific (LNG) natural gas

NOMINAL VALUE 0.15 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_I - x_R,_i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	cmol/mol	cmol/mol	cmol/mol
VSL	-0.00001	0.00029
VNIIM	-0.00005	0.00103
NIM	-0.00006	0.00044
NPL	0.00006	0.00058
NMIA	0.00015	0.00065
BAM	0.00001	0.00030
GUM	0.00019	0.00122
CMI	0.00064	0.00103
BFKH	0.00011	0.00056
NMIJ	-0.00024	0.00035
UME	0.00007	0.00031

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CCQM-K118b

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Comparison

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CCQM-K118.1

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Information & contact
Participants

Metrology area, Sub-field	Chemistry and Biology, Gases
Description	Natural gas
Time of measurements	2025
Status	Protocol complete

References	Technical protocol
Measurand	Amount fractions of nitrogen, carbon dioxide, methane, ethane, propane, iso-butane, n-butane, neo-pentane, iso-pentane, n-pentane, n-hexane, hydrogen and helium
Parameters	Natural gas (type IVa, hydrogen-enriched natural gas)
Transfer device	Gas mixture

Comparison type	Key Comparison
Consultative Committee	CCQM (Consultative Committee for Amount of Substance)
Conducted by	CCQM (Consultative Committee for Amount of Substance)
Pilot institute	VSL VSL Netherlands
Contact person	A. van der Veen +31 15 2691500

Pilot laboratory
VSL	VSL, Netherlands, EURAMET

IPQ	Instituto Portugues da Qualidade, Portugal, EURAMET

KRISS

Korea Research Institute of Standards and Science, Korea, Republic of, APMP

SE "Ukrmetrteststandard"

State Enterprise "Ukrmetrteststandard", Ukraine, EURAMET

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MEASURAND Amount-of-substance fraction of Carbon dioxide in low calorific value natural gas

NOMINAL VALUE 4 cmol/mol

KCRVs for carbon dioxide: The consensus value computed from the LCS is 4.0044 cmol/mol, with standard uncertainty 0.0017 cmol/mol. The excess standard deviation uτ is 0.0024 cmol/mol (0.06 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab_i	x_R_,i	U_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	4.005	0.004
VNIIM	4.004	0.005
SMU	4.004	0.004
NIM	4.004	0.004
NPL	4.003	0.004
NMIA	4.005	0.004
BAM	4.004	0.004
GUM	4.005	0.004
CMI	4.004	0.004
NMISA	4.005	0.004
NMIJ	4.005	0.004
KRISS	4.004	0.005
UME	4.005	0.004

The results of VNIIM, NMISA, NMIJ and KRISS are not consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of Ethane in low calorific value natural gas

NOMINAL VALUE 0.75 cmol/mol

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab_i	x_R_,i	U_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.7450	0.0012
VNIIM	0.7447	0.0016
SMU	0.7451	0.0013
NIM	0.7448	0.0013
NPL	0.7453	0.0012
NMIA	0.7451	0.0011
BAM	0.7451	0.0014
GUM	0.7452	0.0015
CMI	0.7450	0.0014
NMISA	0.7453	0.0014
NMIJ	0.7447	0.0012
KRISS	0.7447	0.0019
UME	0.7448	0.0012

The result of KRISS is not consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of Nitrogen in low calorific value natural gas

NOMINAL VALUE 12 cmol/mol

The key comparison reference value x_R,iis computed from the largest consistent subset (LCS) of the submitted results x_i, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the CCQM-K118 Final report.

The data evaluation was performed using a consensus value and a laboratory effect model. The consensus value computed from the LCS is 11.985 cmol/mol, with standard uncertainty 0.006 cmol/mol. The excess standard deviation τ is 0.008 cmol/mol (0.07 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R,_i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence (See section 3.4 on p.9 of the Final report for comtation of U_i)

Lab_i	x_R_,i	U_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	11.9843	0.0113
VNIIM	11.9844	0.0113
SMU	11.9837	0.0115
NIM	11.9860	0.0113
NPL	11.9862	0.0113
NMIA	11.9840	0.0113
BAM	11.9834	0.0113
GUM	11.9833	0.0117
CMI	11.9851	0.0113
NMISA	11.9849	0.0113
NMIJ	11.9845	0.0113
KRISS	11.9849	0.0113
UME	11.9858	0.0113

The results of VNIIM and KRISS are not consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of Hydrogen in low calorific value natural gas

NOMINAL VALUE 3 cmol/mol

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab_i	x_R_,i	U_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	2.9994	0.0059
VNIIM	2.9997	0.0059
SMU	3.0018	0.0059
NIM	2.9997	0.0059
NPL	3.0025	0.0060
NMIA	2.9995	0.0059
BAM	3.0011	0.0059
GUM	3.0001	0.0059
CMI	3.0012	0.0059
NMISA	2.9992	0.0060
NMIJ	2.9987	0.0059
KRISS	3.0020	0.0060
UME	3.0018	0.0060

The result of NMIJ is not consistent with the KCRV.

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CCQM-K118

MEASURAND Amount-of-substance fraction of Methane in low calorific value natural gas

NOMINAL VALUE 78.85 cmol/mol

KCRVs for methane: The consensus value computed from the LCS is 78.881 cmol/mol, with standard uncertainty 0.013 cmol/mol. The excess standard deviation τ is 0.018 cmol/mol (0.02 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab _i	participating institute
x_R_,i	key comparison reference value determined by interpolation
u_R_,i	standard uncertainty of x_R_,i


Lab_i	x_R_,i	u_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	78.88	0.03
VNIIM	78.90	0.03
SMU	78.88	0.03
NIM	78.89	0.03
NPL	78.88	0.03
NMIA	78.88	0.03
BAM	78.88	0.03
GUM	78.88	0.03
CMI	78.88	0.03
NMISA	78.88	0.03
NMIJ	78.89	0.03
KRISS	78.88	0.03
UME	78.88	0.03

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CCQM-K118

MEASURAND Amount-of-substance fraction of iso-Butane in low calorific value natural gas

NOMINAL VALUE 78.85 cmol/mol

KCRVs for iso-butane: The consensus value computed from the LCS is 0.19975 cmol/mol, with standard uncertainty 0.00008 cmol/mol. The excess standard deviation τ is 0.00010 cmol/mol (0.05 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab _i	participating institute
x_R_,i	key comparison reference value determined by interpolation
u_R_,i	standard uncertainty of x_R_,i


Lab_i	x_R_,i	u_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.1998	0.0002
VNIIM	0.1998	0.0002
SMU	0.1997	0.0002
NIM	0.1998	0.0002
NPL	0.1997	0.0002
NMIA	0.1998	0.0002
BAM	0.1997	0.0002
GUM	0.1998	0.0002
CMI	0.1997	0.0002
NMIJ	0.1998	0.0002
KRISS	0.1997	0.0002
UME	0.1997	0.0002
NIST	70.3540	0.0760

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CCQM-K118

MEASURAND Amount-of-substance fraction of iso-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

KCRVs for iso-pentane: The consensus value computed from the LCS is 0.04985 cmol/mol, with standard uncertainty 0.00006 cmol/mol. The excess standard deviation τ is 0.00011 cmol/mol (0.23 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab _i	participating institute
x_R_,i	key comparison reference value determined by interpolation
u_R_,i	standard uncertainty of x_R_,i


Lab_i	x_R_,i	u_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.0499	0.0001
VNIIM	0.0499	0.0001
SMU	0.0498	0.0001
NIM	0.0499	0.0001
NPL	0.0498	0.0001
NMIA	0.0499	0.0001
BAM	0.0498	0.0001
GUM	0.0499	0.0001
CMI	0.0498	0.0001
NMIJ	0.0499	0.0001
KRISS	0.0499	0.0001
UME	0.0498	0.0001
NIST	70.3540	0.0760

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CCQM-K118

MEASURAND Amount-of-substance fraction of n-Butane in low calorific value natural gas

NOMINAL VALUE 0.2 cmol/mol

KCRVs for n-butane: The consensus value computed from the LCS is 0.19988 cmol/mol, with standard uncertainty 0.00011 cmol/mol. The excess standard deviation τ is 0.00018 cmol/mol (0.09 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab_i	x_R_,i	u_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.2000	0.0002
VNIIM	0.1999	0.0002
SMU	0.1998	0.0002
NIM	0.1999	0.0002
NPL	0.1998	0.0002
NMIA	0.1999	0.0002
BAM	0.1998	0.0002
GUM	0.1999	0.0002
CMI	0.1998	0.0002
NMISA	0.2000	0.0002
NMIJ	0.2000	0.0002
KRISS	0.1998	0.0002
UME	0.1999	0.0002

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CCQM-K118

MEASURAND Amount-of-substance fraction of neo-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

KCRVs for neo-pentane: The consensus value computed from the LCS is 0.04934 cmol/mol, with standard uncertainty 0.00005 cmol/mol. The excess standard deviation τ is 0.00008 cmol/mol (0.17 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab _i	participating institute
x_R_,i	key comparison reference value determined by interpolation
u_R,i	standard uncertainty of x_R_,i


Lab_i	x_R_,i	u_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.0494	0.0001
VNIIM	0.0494	0.0001
SMU	0.0493	0.0001
NIM	0.0493	0.0001
NPL	0.0493	0.0001
NMIA	0.0493	0.0001
BAM	0.0493	0.0001
GUM	0.0494	0.0001
CMI	0.0493	0.0001
NMIJ	0.0494	0.0001
KRISS	0.0493	0.0001
UME	0.0493	0.0001
NIST	70.3540	0.0760

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CCQM-K118

MEASURAND Amount-of-substance fraction of n-Hexane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

KCRVs for n-hexane: The consensus value computed from the LCS is 0.04970 cmol/mol, with standard uncertainty 0.00006 cmol/mol. The excess standard deviation τ is 0.00011 cmol/mol (0.22 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab _i	participating institute
x_R_,i	key comparison reference value determined by interpolation
u_R_,i	standard uncertainty of x_R_,i


Lab_i	x_R_,i	u_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.0497	0.0001
VNIIM	0.0497	0.0001
SMU	0.0497	0.0001
NIM	0.0497	0.0001
NPL	0.0497	0.0001
NMIA	0.0497	0.0001
BAM	0.0497	0.0001
GUM	0.0497	0.0001
CMI	0.0497	0.0001
NMISA	0.0497	0.0001
NMIJ	0.0498	0.0001
KRISS	0.0497	0.0001
UME	0.0497	0.0001

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CCQM-K118

MEASURAND Amount-of-substance fraction of Propane in low calorific value natural gas

NOMINAL VALUE 0.3 cmol/mol

KCRVs for propane: The consensus value computed from the LCS is 0.29849 cmol/mol, with standard uncertainty 0.00018 cmol/mol. The excess standard deviation τ is 0.00030 cmol/mol (0.10 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab _i	participating institute
x_R_,i	key comparison reference value determined by interpolation
u_R_,i	standard uncertainty of x_R,_i


Lab_i	x_R_,i	u_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.2986	0.0005
VNIIM	0.2985	0.0005
SMU	0.2985	0.0005
NIM	0.2985	0.0005
NPL	0.2984	0.0004
NMIA	0.2986	0.0004
BAM	0.2983	0.0005
GUM	0.2985	0.0006
CMI	0.2985	0.0005
NMISA	0.2986	0.0006
NMIJ	0.2984	0.0005
KRISS	0.2983	0.0005
UME	0.2986	0.0005

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CCQM-K118

MEASURAND Amount-of-substance fraction of Helium in low calorific value natural gas

NOMINAL VALUE 0.5 cmol/mol

KCRVs for helium: The consensus value computed from the LCS is 0.50225 cmol/mol, with standard uncertainty 0.00039 cmol/mol. The excess standard deviation τ is 0.00048cmol/mol (0.09 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab _i	participating institute
x_R_,i	key comparison reference value determined by interpolation
u_R_,i	standard uncertainty of x_R_,i


Lab_i	x_R_,i	u_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.502	0.001
VNIIM	0.502	0.001
SMU	0.503	0.001
NIM	0.502	0.001
NPL	0.503	0.001
NMIA	0.502	0.001
BAM	0.502	0.001
GUM	0.502	0.001
CMI	0.502	0.001
NMISA	0.502	0.001
NMIJ	0.502	0.001
KRISS	0.503	0.001
UME	0.503	0.001

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CCQM-K118

MEASURAND Amount-of-substance fraction of n-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

KCRVs for n-pentane: The consensus value computed from the LCS is 0.05017 cmol/mol, with standard uncertainty 0.00005 cmol/mol. The excess standard deviation τ is 0.00009 cmol/mol (0.18 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

D_i = (x_i - x_R,i) and its expanded uncertainty U_i at a 95 % level of confidence where U_i = 2 u_i.

Lab _i	participating institute
x_R_,i	key comparison reference value determined by interpolation
u_R,_i	standard uncertainty of x_R,_i


Lab_i	x_R_,i	u_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.0502	0.0001
VNIIM	0.0502	0.0001
SMU	0.0501	0.0001
NIM	0.0502	0.0001
NPL	0.0502	0.0001
NMIA	0.0502	0.0001
BAM	0.0502	0.0001
GUM	0.0502	0.0001
CMI	0.0501	0.0001
NMISA	0.0502	0.0001
NMIJ	0.0502	0.0001
KRISS	0.0501	0.0001
UME	0.0501	0.0001

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MEASURAND Amount-of-substance fraction of Methane in high calorific (LNG) natural gas

NOMINAL VALUE 87.52 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Degrees of equivalence represented by D_i = (x_i - x_R_,i) and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in cmol/mol.

Methane consensus value is 87.531 cmol/mol with standard uncertainty 0.009 cmol/mol. The excess standard deviation τ is 0.010 cmol/mol (0.012% as relative standard uncertainty).

Lab _i	participating institute
x_R_,i	Methane key comparison reference value
u_R_,i	standard uncertainty of x_R_,i
U_R_,i	expanded uncertainty, U_R_,i = k ´ u_R,_i; k = 2

Lab_i	x_R_,i	U_R,i
Lab_i	cmol/mol	cmol/mol
VSL	87.526	0.025
VNIIM	87.529	0.021
NIM	87.540	0.021
NPL	87.530	0.021
NMIA	87.539	0.019
BAM	87.517	0.020
GUM	87.516	0.025
CMI	87.537	0.020
NMISA	87.533	0.024
BFKH	87.531	0.022
NMIJ	87.525	0.025
UME	87.529	0.019

The NMIJ result is not consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of Carbon dioxide in high calorific (LNG) natural gas

NOMINAL VALUE 0.02 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Carbon dioxide consensus value is 0.019 893 cmol/mol with standard uncertainty 0.000 034 cmol/mol. The excess standard deviation τ is 0.000056 cmol/mol (0.28% as relative standard uncertainty).

Lab _i	participating institute
x_R_,i	Carbon dioxide key comparison reference value
u_R_,i	standard uncertainty of x_R_,i
U_R_,i	expanded uncertainty, U_R_,i = k ´ u_R,_i; k = 2

Lab_i	x_R_,i	u_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.019899	0.000072
VNIIM	0.019873	0.000080
NIM	0.019908	0.000075
NPL	0.019886	0.000072
NMIA	0.019897	0.000075
BAM	0.019898	0.000076
GUM	0.019884	0.000072
CMI	0.019965	0.000091
NMISA	0.019912	0.000078
BFKH	0.019890	0.000072
NMIJ	0.019936	0.000072
UME	0.019890	0.000070

All results are consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of Nitrogen in high calorific (LNG) natural gas

NOMINAL VALUE 0.12 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

The consensus value for nitrogen: 0.121 92 cmol/mol with standard uncertainty 0.000 36 cmol/ mol. The excess standard deviation
τ is 0.000 42 cmol/mol (0.35% as relative standard uncertainty).

Lab _i	participating institute
x_R_,i	Nitrogen key comparison reference value
u_R_,i	standard uncertainty of x_R_,i
U_R_,i	expanded uncertainty, U_R_,i = k ´ u_R,_i; k = 2

Lab_i	x_R,i	U_R,i
Lab_i	cmol/mol	cmol/mol
VSL	0.12186	0.00092
VNIIM	0.12210	0.00082
NIM	0.12152	0.00104
NPL	0.12225	0.00077
NMIA	0.12153	0.00086
BAM	0.12160	0.00092
GUM	0.12109	0.00080
CMI	0.12184	0.00096
NMISA	0.12137	0.00092
BFKH	0.12123	0.00098
NMIJ	0.12099	0.00102
UME	0.12097	0.00085

NIM and CMI results that are not consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of Propane in high calorific (LNG) natural gas

NOMINAL VALUE 2 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Propane consensus value is 2.000 cmol/mol with standard uncertainty 0.001 cmol/mol. The excess standard deviation τ is 0.001 cmol/mol (0.04% as relative standard uncertainty).

Lab _i	participating institute
x_R_,i	Propane key comparison reference value (KCRV)
u_R_,i	standard uncertainty of x_R_,i
U_R_,i	expanded uncertainty, U_R_,i = k ´ u_R,_i; k = 2

Lab_i	x_R_,i	U_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	2.0002	0.0016
VNIIM	1.9992	0.0018
NIM	1.9987	0.0016
NPL	1.9987	0.0016
NMIA	1.9995	0.0016
BAM	1.9997	0.0016
GUM	2.0000	0.0018
CMI	1.9997	0.0017
NMISA	1.9989	0.0018
BFKH	1.9992	0.0018
NMIJ	2.0001	0.0018
UME	2.0006	0.0016

GUM, CMI and NMIJ results are not consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of Ethane in high calorific (LNG) natural gas

NOMINAL VALUE 10 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

Ethane consensus value is 10.0005 cmol/mol with standard uncertainty 0.0026 cmol/mol. The excess standard deviation τ is 0.0027 cmol/mol (0.03% as relative standard uncertainty).

Lab _i	participating institute
x_R_,i	Ethane key comparison reference value (KCRV)
u_R_,i	standard uncertainty of x_R_,i
U_R_,i	expanded uncertainty, U_R_,i = k ´ u_R,_i; k = 2

Lab_i	x_R_,i	U_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	10.0029	0.0054
VNIIM	9.9969	0.0070
NIM	9.9991	0.0055
NPL	9.9973	0.0055
NMIA	10.0007	0.0055
BAM	10.0018	0.0059
GUM	10.0017	0.0056
CMI	9.9984	0.0072
NMISA	9.9965	0.0066
BFKH	9.9987	0.0064
NMIJ	10.0021	0.0054
UME	10.0022	0.0059

The CMI result is not consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of iso-Pentane in high calorific (LNG) natural gas

NOMINAL VALUE 0.02 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

iso-Pentane consensus value is 0.019 90 cmol/mol with standard uncertainty 0.000 03 cmol/mol. The excess standard deviation τ is 0.00003 cmol/mol (0.14% as relative standard uncertainty).

Lab _i	participating institute
x_R_,i	iso-Pentane key comparison reference value (KCRV)
u_R_,i	standard uncertainty of x_R_,i
U_R_,i	expanded uncertainty, U_R_,i = k ´ u_R,_i; k = 2

Lab_i	x_R_,i	U_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.019912	0.000058
VNIIM	0.019904	0.000058
NIM	0.019897	0.000058
NPL	0.019894	0.000058
NMIA	0.019913	0.000059
BAM	0.019906	0.000058
GUM	0.019907	0.000058
CMI	0.019911	0.000058
NMISA	0.019890	0.000058
BFKH	0.019897	0.000058
NMIJ	0.019905	0.000059
UME	0.019916	0.000058

NMIA, GUM, CMI, BFKH, NMIJ and UME results are not consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of n-Pentane in high calorific (LNG) natural gas

NOMINAL VALUE 0.02 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

n-Pentane consensus value is 0.020 09 cmol/mol with standard uncertainty 0.000 02 cmol/mol. The excess standard deviation τ is 0.000 03 cmol/mol (0.15% as relative standard uncertainty).

Lab _i	participating institute
x_R_,i	n-Pentane key comparison reference value (KCRV)
u_R_,i	standard uncertainty of x_R_,i
U_R_,i	expanded uncertainty, U_R_,i = k ´ u_R,_i; k = 2

Lab_i	x_R_,i	U_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.02010	0.00004
VNIIM	0.02009	0.00004
NIM	0.02009	0.00004
NPL	0.02008	0.00004
NMIA	0.02008	0.00005
BAM	0.02010	0.00004
GUM	0.02009	0.00004
CMI	0.02010	0.00004
NMISA	0.02007	0.00004
BFKH	0.02008	0.00004
NMIJ	0.02010	0.00004
UME	0.02010	0.00004

CMI and UME results are not consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of n-Butane in high calorific (LNG) natural gas

NOMINAL VALUE 0.15 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

n-Butane consensus value is 0.148 59 cmol/mol with standard uncertainty 0.000 09 cmol/mol. The excess standard deviation τ is 0.000 10 cmol/mol (0.07% as relative standard uncertainty).

Lab _i	participating institute
x_R_,i	Nitrogen key comparison reference value (KCRV)
u_R_,i	standard uncertainty of x_R_,i
U_R_,i	expanded uncertainty, U_R_,i = k ´ u_R,_i; k = 2

Lab_i	x_R_,i	U_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.14864	0.00019
VNIIM	0.14854	0.00020
NIM	0.14851	0.00019
NPL	0.14852	0.00019
NMIA	0.14862	0.00019
BAM	0.14862	0.00019
GUM	0.14863	0.00019
CMI	0.14859	0.00019
NMISA	0.14851	0.00019
BFKH	0.14853	0.00020
NMIJ	0.14862	0.00020
UME	0.14866	0.00019

The NMISA result is not consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of iso-Butane in high calorific (LNG) natural gas

NOMINAL VALUE 0.15 cmol/mol

GAS MIXTURE expressed in cmol/mol: Nitrogen: 0.12, Carbon dioxide: 0.02, Ethane: 10, Propane: 2, iso-Butane: 0.15, n-Butane: 0.15, iso-Pentane: 0.02, n-Pentane: 0.02, Methane: 87.52

The data evaluation was performed using a consensus value and a laboratory effect model. The results of the participants were benchmarked against a key comparison reference value x_R_,i computed from the largest consistent subset (LCS) of the submitted results x_I, adjusted for the differences between the travelling standards as described in section 5 on p. 45 of the final report .

The iso-Butane consensus value is 0.149 15 cmol/mol with standard uncertainty 0.000 06 cmol/mol. The excess standard deviation τ is 0.000 06 cmol/mol (0.04% as relative standard uncertainty).

Lab _i	participating institute
x_R_,i	Nitrogen key comparison reference value (KCRV)
u_R_,i	standard uncertainty of x_R_,i
U_R_,i	expanded uncertainty, U_R_,i = k ´ u_R,_i; k = 2

Lab_i	x_R_,i	U_R_,i
Lab_i	cmol/mol	cmol/mol
VSL	0.14921	0.00013
VNIIM	0.14915	0.00012
NIM	0.14907	0.00012
NPL	0.14908	0.00013
NMIA	0.14918	0.00013
BAM	0.14918	0.00012
GUM	0.14921	0.00013
CMI	0.14916	0.00013
BFKH	0.14909	0.00013
NMIJ	0.14916	0.00013
UME	0.14923	0.00012

All results are consistent with the KCRV.

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MEASURAND Amount-of-substance fraction of Carbon dioxide in low calorific value natural gas

NOMINAL VALUE 4 cmol/mol

x_i measured CO₂ amount-of-substance fraction reported by laboratory i, Lab_i

U_i expanded uncertainty of x_iwith coverage factork = 2

Lab_i	x_i	U_i
Lab_i	cmol/mol	cmol/mol
VSL	4.005	0.004
VNIIM	3.989	0.011
SMU	4.001	0.016
NIM	3.998	0.009
NPL	4.001	0.004
NMIA	4.007	0.003
BAM	4.000	0.006
GUM	4.019	0.024
CMI	4.004	0.007
NMISA	5.714	0.119
NMIJ	4.103	0.018
KRISS	3.985	0.008
UME	4.013	0.008

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MEASURAND Amount-of-substance fraction of Ethane in low calorific value natural gas

NOMINAL VALUE 0.75 cmol/mol

x_i measured ethane amount-of-substance fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

U_i= k u_i expanded uncertainty of x_iwith k = 2

Lab_i	x_i	U_i
Lab_i	cmol/mol	cmol/mol
VSL	0.7444	0.0015
VNIIM	0.7430	0.0040
SMU	0.7460	0.0021
NIM	0.7446	0.0019
NPL	0.7460	0.0015
NMIA	0.7456	0.0013
BAM	0.7448	0.0031
GUM	0.7510	0.0060
CMI	0.7463	0.0032
NMISA	0.7417	0.0187
NMIJ	0.7441	0.0006
KRISS	0.7406	0.0022
UME	0.7445	0.0014

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MEASURAND Amount-of-substance fraction of Nitrogen in low calorific value natural gas

NOMINAL VALUE 12 cmol/mol

x_i measured nitrogen amount-of-substance fraction reported by laboratory i, Lab_i

U_Labi expanded uncertainty of x_iwith k = 2

Lab_i	x_i	U_{Lab i}
Lab_i	cmol/mol	cmol/mol
VSL	11.9805	0.0120
VNIIM	11.9400	0.0300
SMU	11.9770	0.0340
NIM	11.9670	0.0250
NPL	11.9736	0.0180
NMIA	11.9723	0.0050
BAM	11.9792	0.0068
GUM	12.0230	0.0480
CMI	11.9932	0.0144
NMISA	11.9632	0.0779
NMIJ	11.9698	0.0574
KRISS	11.9121	0.0238
UME	12.0080	0.0240

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MEASURAND Amount-of-substance fraction of Hydrogen in low calorific value natural gas

NOMINAL VALUE 3 cmol/mol

The results of laboratory i are given by a pair of terms, both expressed in (cmol/mol):

To add comparison identifier

x_i measured hydrogen amount-of-substance fraction by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

U_i= k u_i expanded uncertainty of x_iwith k = 2

Lab_i	x_i	*U_i*
Lab_i	cmol/mol	cmol/mol
VSL	2.9983	0.0045
VNIIM	2.9910	0.0130
SMU	3.0100	0.0320
NIM	3.0004	0.0075
NPL	3.0008	0.0150
NMIA	3.0088	0.0050
BAM	3.0036	0.0037
GUM	2.9970	0.0240
CMI	2.9790	0.0198
NMISA	3.0092	0.1266
NMIJ	2.9133	0.0135
KRISS	2.9829	0.0060
UME	3.0080	0.0040

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CCQM-K118

MEASURAND amount of substance fraction of methane in low calorific value natural gas

NOMINAL VALUE 78.85 cmol/mol

CCQM-K118

x_i measured mass fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

Lab_i	x_i	u_i
Lab_i	cmol/mol	cmol/mol
VSL	78.74	0.08
VNIIM	78.94	0.04
SMU	78.88	0.12
NIM	78.89	0.03
NPL	78.89	0.03
NMIA	78.87	0.05
BAM	78.87	0.01
GUM	78.82	0.08
CMI	78.87	0.03
NMISA	78.45	1.62
NMIJ	78.98	0.33
KRISS	78.99	0.08
UME	78.85	0.15

CCQM-K118

The measurement results are listed in Appendix I of the CCQM-K118 Final Report.

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CCQM-K118

MEASURAND Amount-of-substance fraction of iso-Butane in low calorific value natural gas

NOMINAL VALUE 78.85 cmol/mol

KCRVs for iso-butane: The consensus value computed from the LCS is 3.0007 cmol/mol, with standard uncertainty 0.0029 cmol/mol. The excess standard deviation τ is 0.0046 cmol/mol (0.15 % as relative standard uncertainty).

The degree of equivalence of laboratory i relative to the key comparison reference value x_R_,i is given by a pair of terms, both expressed in (cmol/mol):

CCQM-K118

x_i measured mass fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

Lab_i	x_i	u_i
Lab_i	cmol/mol	cmol/mol
VSL	0.1998	0.0002
VNIIM	0.1993	0.0015
SMU	0.1998	0.0011
NIM	0.1999	0.0005
NPL	0.1996	0.0007
NMIA	0.1999	0.0004
BAM	0.1997	0.0002
GUM	0.2070	0.0017
CMI	0.1996	0.0014
NMIJ	0.1996	0.0003
KRISS	0.1988	0.0006
UME	0.2001	0.0004
NIST	70.401*	0.1760

CCQM-K118

The measurement results are listed in Appendix I of the CCQM-K118 Final Report.

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CCQM-K118

MEASURAND amount of substance fraction of iso-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

CCQM-K118

x_i measured mass fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

Lab_i	x_i	u_i
Lab_i	cmol/mol	cmol/mol
VSL	0.04983	0.00012
VNIIM	0.04990	0.00050
SMU	0.04970	0.00043
NIM	0.04985	0.00020
NPL	0.04982	0.00020
NMIA	0.05014	0.00014
BAM	0.04984	0.00013
GUM	0.04977	0.00050
CMI	0.04990	0.00030
NMIJ	0.04942	0.00005
KRISS	0.04937	0.00147
UME	0.04969	0.00014
NIST	70.401*	0.17600

To add comparison identifier

The measurement results are listed in Appendix I of the CCQM-K118 Final Report.

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CCQM-K118

MEASURAND amount of substance fraction of n-Butane in low calorific value natural gas

NOMINAL VALUE 0.2 cmol/mol

CCQM-K118

x_i measured mass fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

INSERT TABLE

Lab_i	x_i	u_i
Lab_i	cmol/mol	cmol/mol
VSL	0.2002	0.0002
VNIIM	0.1993	0.0016
SMU	0.2001	0.0011
NIM	0.1997	0.0005
NPL	0.1998	0.0007
NMIA	0.2000	0.0004
BAM	0.1996	0.0002
GUM	0.2004	0.0016
CMI	0.1998	0.0015
NMISA	0.2000	0.0047
NMIJ	0.1992	0.0003
KRISS	0.1984	0.0006
UME	0.1998	0.0004

To add comparison identifier

The measurement results are listed in Appendix I of the CCQM-K118 Final Report.

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CCQM-K118

MEASURAND amount of substance fraction of neo-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

CCQM-K118

x_i measured mass fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

Lab_i	x_i	u_i
Lab_i	cmol/mol	cmol/mol
VSL	0.0494	0.0001
VNIIM	0.0493	0.0003
SMU	0.0497	0.0005
NIM	0.0493	0.0002
NPL	0.0493	0.0002
NMIA	0.0493	0.0002
BAM	0.0494	0.0001
GUM	0.0495	0.0010
CMI	0.0497	0.0005
NMIJ	0.0492	0.0001
KRISS	0.0491	0.0010
UME	0.0490	0.0001
NIST	70.401*	0.1760

CCQM-K118

The measurement results are listed in Appendix I of the CCQM-K118 Final Report.

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CCQM-K118

MEASURAND amount of substance fraction of n-Hexane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

CCQM-K118

x_i measured mass fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

Lab_i	x_i	u_i
Lab_i	cmol/mol	cmol/mol
VSL	0.0496	0.0001
VNIIM	0.0498	0.0006
SMU	0.0497	0.0004
NIM	0.0497	0.0001
NPL	0.0498	0.0002
NMIA	0.0496	0.0008
BAM	0.0496	0.0002
GUM	0.0500	0.0003
CMI	0.0499	0.0003
NMISA	0.0502	0.0012
NMIJ	0.0495	0.0000
KRISS	0.0492	0.0010
UME	0.0495	0.0002

CCQM-K118

The measurement results are listed in Appendix I of the CCQM-K118 Final Report.

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CCQM-K118

MEASURAND amount of substance fraction of Propane in low calorific value natural gas

NOMINAL VALUE 0.3 cmol/mol

CCQM-K118

x_i measured mass fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

Lab_i	x_i	u_i
Lab_i	cmol/mol	cmol/mol
VSL	0.2987	0.0009
VNIIM	0.2978	0.0016
SMU	0.2989	0.0015
NIM	0.2984	0.0008
NPL	0.2984	0.0004
NMIA	0.2986	0.0006
BAM	0.2982	0.0010
GUM	0.2979	0.0024
CMI	0.3000	0.0013
NMISA	0.2988	0.0072
NMIJ	0.2981	0.0002
KRISS	0.2965	0.0009
UME	0.2990	0.0006

CCQM-K118

The measurement results are listed in Appendix I of the CCQM-K118 Final Report.

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CCQM-K118

MEASURAND amount of substance fraction of Helium in low calorific value natural gas

NOMINAL VALUE 0.5 cmol/mol

CCQM-K118

x_i measured mass fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

Lab_i	x_i	u_i
Lab_i	cmol/mol	cmol/mol
VSL	0.503	0.001
VNIIM	0.500	0.003
SMU	0.503	0.005
NIM	0.501	0.001
NPL	0.504	0.003
NMIA	0.502	0.001
BAM	0.503	0.001
GUM	0.501	0.003
CMI	0.504	0.004
NMISA	0.512	0.028
NMIJ	0.496	0.002
KRISS	0.499	0.001
UME	0.509	0.001

CCQM-K118

The measurement results are listed in Appendix I of the CCQM-K118 Final Report.

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CCQM-K118

MEASURAND amount of substance fraction of n-Pentane in low calorific value natural gas

NOMINAL VALUE 0.05 cmol/mol

CCQM-K118

x_i measured mass fraction reported by laboratory i, Lab_i

u_i combined standard uncertainty of x_i

Lab_i	x_i	u_i
Lab_i	cmol/mol	cmol/mol
VSL	0.0503	0.0001
VNIIM	0.0501	0.0004
SMU	0.0502	0.0004
NIM	0.0500	0.0002
NPL	0.0502	0.0002
NMIA	0.0502	0.0002
BAM	0.0502	0.0002
GUM	0.0506	0.0003
CMI	0.0500	0.0003
NMISA	0.0503	0.0012
NMIJ	0.0501	0.0001
KRISS	0.0495	0.0012
UME	0.0501	0.0002

CCQM-K118

The measurement results are listed in Appendix I of the CCQM-K118 Final Report.

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Amount-of-substance fraction results for the high-calorific natural gas (LNG) with nominal values expressed in cmol/mol: Nitrogen 0.12; Carbon dioxide 0.02; Ethane 10; Propane 2; iso-Butane 0.15, n-Butane 0.15; iso-Pentane 0.02; n-Pentane 0.02; Methane 87.52

Lab _i	participating institute
x_i	Methane amount-of-substance fraction submitted by institute i
u_i	standard uncertainty of x_i
U_i	expanded uncertainty, U_i = k ´ u_i; k = 2

Lab_i	x_i	U_i
Lab_i	cmol/mol	cmol/mol
VSL	87.505	0.088
VNIIM	87.561	0.050
NIM	87.534	0.030
NPL	87.534	0.035
NMIA	87.521	0.050
BAM	87.518	0.015
GUM	87.519	0.088
CMI	87.555	0.027
NMISA	87.119	1.625
BFKH	87.515	0.028
NMIJ	87.162	0.273
UME	87.519	0.064

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Amount-of-substance fraction results for the high-calorific natural gas (LNG) with nominal values expressed in cmol/mol: Nitrogen 0.12; Carbon dioxide 0.02; Ethane 10; Propane 2; iso-Butane 0.15, n-Butane 0.15; iso-Pentane 0.02; n-Pentane 0.02; Methane 87.52.

Lab _i	participating institute
x_i	Carbon dioxide amount-of-substance fraction submitted by institute i
u_i	standard uncertainty of x_i
U_i	expanded uncertainty, U_i = k ´ u_i; k = 2

Lab_i	x_i	U_i
Lab_i	cmol/mol	cmol/mol
VSL	0.01996	0.00010
VNIIM	0.01980	0.00015
NIM	0.01978	0.00010
NPL	0.01984	0.00040
NMIA	0.01979	0.00030
BAM	0.01995	0.00006
GUM	0.01984	0.00004
CMI	0.02000	0.00020
NMISA	0.01865	0.00134
BFKH	0.01980	0.00020
NMIJ	0.02008	0.00005
UME	0.01998	0.00012

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Amount-of-substance fraction results for the high-calorific natural gas (LNG) with nominal values expressed in cmol/mol: Nitrogen 0.12; Carbon dioxide 0.02; Ethane 10; Propane 2; iso-Butane 0.15, n-Butane 0.15; iso-Pentane 0.02; n-Pentane 0.02; Methane 87.52

Lab _i	participating institute
x_i	Nitogen amount-of-substance fraction submitted by institute i
u_i	standard uncertainty of x_i
U_i	expanded uncertainty, U_i = k ´ u_i; k = 2

Lab_i	x_i	U_i
Lab_i	cmol/mol	cmol/mol
VSL	0.12210	0.00075
VNIIM	0.12070	0.00080
NIM	0.12460	0.00062
NPL	0.12218	0.00061
NMIA	0.12162	0.00060
BAM	0.12204	0.00072
GUM	0.11954	0.00048
CMI	0.11960	0.00090
NMISA	0.12056	0.00885
BFKH	0.12070	0.00050
NMIJ	0.12263	0.00051
UME	0.12200	0.00020

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Amount-of-substance fraction results for the high-calorific natural gas (LNG) with nominal values expressed in cmol/mol: Nitrogen 0.12; Carbon dioxide 0.02; Ethane 10; Propane 2; iso-Butane 0.15, n-Butane 0.15; iso-Pentane 0.02; n-Pentane 0.02; Methane 87.52.

Lab _i	participating institute
x_i	Propane amount-of-substance fraction submitted by institute i
u_i	standard uncertainty of x_i
U_i	expanded uncertainty, U_i = k ´ u_i; k = 2

Lab_i	x_i	U_i
Lab_i	cmol/mol	cmol/mol
VSL	1.9999	0.0022
VNIIM	1.9910	0.0110
NIM	1.9968	0.0050
NPL	1.9976	0.0030
NMIA	1.9986	0.0033
BAM	1.9994	0.0024
GUM	1.9870	0.0079
CMI	2.0070	0.0056
NMISA	1.9914	0.0448
BFKH	2.0000	0.0020
NMIJ	2.0161	0.0029
UME	2.0010	0.0020

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Amount-of-substance fraction results for the high-calorific natural gas (LNG) with nominal values expressed in cmol/mol: Nitrogen 0.12; Carbon dioxide 0.02; Ethane 10; Propane 2; iso-Butane 0.15, n-Butane 0.15; iso-Pentane 0.02; n-Pentane 0.02; Methane 87.52.

Lab _i	participating institute
x_i	Ethane amount-of-substance fraction submitted by institute i
u_i	standard uncertainty of x_i
U_i	expanded uncertainty, U_i = k ´ u_i; k = 2

Lab_i	x_i	U_i
Lab_i	cmol/mol	cmol/mol
VSL	10.0039	0.0100
VNIIM	9.9700	0.0500
NIM	9.9880	0.0230
NPL	9.9989	0.0200
NMIA	10.0011	0.0060
BAM	10.0027	0.0137
GUM	9.9980	0.0800
CMI	9.9598	0.0197
NMISA	9.9619	0.2293
BFKH	10.0060	0.0130
NMIJ	9.9915	0.0136
UME	10.0050	0.0080

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Amount-of-substance fraction results for the high-calorific natural gas (LNG) with nominal values expressed in cmol/mol: Nitrogen 0.12; Carbon dioxide 0.02; Ethane 10; Propane 2; iso-Butane 0.15, n-Butane 0.15; iso-Pentane 0.02; n-Pentane 0.02; Methane 87.52.

Lab _i	participating institute
x_i	iso-Pentane amount-of-substance fraction submitted by institute i
u_i	standard uncertainty of x_i
U_i	expanded uncertainty, U_i = k ´ u_i; k = 2

Lab_i	x_i	U_i
Lab_i	cmol/mol	cmol/mol
VSL	0.019915	0.000080
VNIIM	0.019970	0.000190
NIM	0.019880	0.000070
NPL	0.019947	0.000080
NMIA	0.020107	0.000080
BAM	0.019886	0.000036
GUM	0.019550	0.000200
CMI	0.020200	0.000100
NMISA	0.019693	0.000564
BFKH	0.020100	0.000100
NMIJ	0.019551	0.000051
UME	0.020420	0.000060

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Amount-of-substance fraction results for the high-calorific natural gas (LNG) with nominal values expressed in cmol/mol: Nitrogen 0.12; Carbon dioxide 0.02; Ethane 10; Propane 2; iso-Butane 0.15, n-Butane 0.15; iso-Pentane 0.02; n-Pentane 0.02; Methane 87.52.

Lab _i	participating institute
x_i	n-Pentane amount-of-substance fraction submitted by institute i
u_i	standard uncertainty of x_i
U_i	expanded uncertainty, U_i = k ´ u_i; k = 2

Lab_i	x_i	U_i
Lab_i	cmol/mol	cmol/mol
VSL	0.02012	0.00008
VNIIM	0.02010	0.00014
NIM	0.02000	0.00007
NPL	0.02009	0.00008
NMIA	0.02012	0.00010
BAM	0.02010	0.00004
GUM	0.02014	0.00012
CMI	0.01990	0.00010
NMISA	0.01997	0.00040
BFKH	0.02010	0.00010
NMIJ	0.01998	0.00007
UME	0.02034	0.00006

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Amount-of-substance fraction results for the high-calorific natural gas (LNG) with nominal values expressed in cmol/mol: Nitrogen 0.12; Carbon dioxide 0.02; Ethane 10; Propane 2; iso-Butane 0.15, n-Butane 0.15; iso-Pentane 0.02; n-Pentane 0.02; Methane 87.52.

Lab _i	participating institute
x_i	n-Butane amount-of-substance fraction submitted by institute i
u_i	standard uncertainty of x_i
U_i	expanded uncertainty, U_i = k ´ u_i; k = 2

Lab_i	x_i	U_i
Lab_i	cmol/mol	cmol/mol
VSL	0.14869	0.00015
VNIIM	0.14810	0.00150
NIM	0.14815	0.00039
NPL	0.14847	0.00052
NMIA	0.14865	0.00060
BAM	0.14830	0.00018
GUM	0.14780	0.00120
CMI	0.14900	0.00100
NMISA	0.15236	0.00356
BFKH	0.14870	0.00040
NMIJ	0.14817	0.00032
UME	0.14870	0.00020

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Amount-of-substance fraction results for the high-calorific natural gas (LNG) with nominal values expressed in cmol/mol: Nitrogen 0.12; Carbon dioxide 0.02; Ethane 10; Propane 2; iso-Butane 0.15, n-Butane 0.15; iso-Pentane 0.02; n-Pentane 0.02; Methane 87.52.

Lab _i	participating institute
x_i	iso-Butane amount-of-substance fraction submitted by institute i
u_i	standard uncertainty of x_i
U_i	expanded uncertainty, U_i = k ´ u_i; k = 2

Lab_i	x_i	U_i
Lab_i	cmol/mol	cmol/mol
VSL	0.14920	0.00015
VNIIM	0.14910	0.00100
NIM	0.14901	0.00037
NPL	0.14914	0.00052
NMIA	0.14932	0.00060
BAM	0.14919	0.00017
GUM	0.14940	0.00120
CMI	0.14980	0.00100
BFKH	0.14920	0.00050
NMIJ	0.14892	0.00025
UME	0.14930	0.00020

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Key and supplementary comparisons - Print out