CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

NOMINAL VALUES for Carbon monoxide : ~ 30 mmol/mol

Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in mmol/mol

Please click onto the graph to get an enlarged version.

Red diamonds: participants in CCQM-K3
Green triangles: participants in EUROMET.QM-K3
Blue circles: participants in APMP.QM-K3
Orange squares: participants in COOMET.QM-K3

CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

NOMINAL VALUES for Carbon dioxide : ~ 135 mmol/mol

Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in mmol/mol

Please click onto the graph to get an enlarged version.

Red diamonds: participants in CCQM-K3
Green triangles: participants in EUROMET.QM-K3
Blue circles: participants in APMP.QM-K3
Orange squares: participants in COOMET.QM-K3

CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

NOMINAL VALUES for Propane : ~ 2 mmol/mol

Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in mmol/mol

Please click onto the graph to get an enlarged version.

Red diamonds: participants in CCQM-K3
Green triangles: participants in EUROMET.QM-K3
Blue circles: participants in APMP.QM-K3
Orange squares: participants in COOMET.QM-K3

CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

NOMINAL VALUES for Carbon monoxide : ~ 30 mmol/mol

   
Lab iDiUi
 /(mmol/mol)/(mmol/mol)
OMH-0.0180.038
BAM0.0370.162
NIST-0.0200.209
NMi-VSL-0.0280.122
NMIJ-0.0400.059
NRCCRM0.0400.109
SMU-0.2250.094
KRISS-0.0150.034
PTB0.0260.067
METAS-0.0260.074
BNM-LNE-0.2820.301
VNIIM0.2930.181
NPL0.0150.068
SMU0.0140.096
IPQ0.0270.112
CSIR-NML-0.2600.461
GUM0.0050.112
CMI-0.6524.400
NMIJ0.010.12
CMS/ITRI-0.070.05
CSIR-NML0.061.60
KRISS-0.040.06
VNIIM0.010.06
UkrCSM-0.110.12
BelGIM-0.060.20
BAM-0.040.15

In dark blue: laboratories participant in CCQM-K3
In green: laboratories participant in EUROMET.QM-K3 (indicated as * in "Lab j" list)
In blue: laboratories participant in APMP.QM-K3
In orange: laboratories participant in COOMET.QM-K3

Additional data: pair-wise degrees of equivalence inside APMP.QM-K3 and COOMET.QM-K3:

All results, including relative degrees of equivalence for COOMET participants, are presented under A4 printable format in Summary Results (.PDF file).

CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

NOMINAL VALUES for Carbon dioxide : ~ 135 mmol/mol

   
Lab iDiUi
 /(mmol/mol)/(mmol/mol)
OMH0.150.14
BAM0.010.70
NIST0.170.24
NMi-VSL0.020.23
NMIJ0.010.13
NRCCRM0.060.47
SMU0.710.56
KRISS-0.020.09
PTB0.300.18
METAS-0.080.31
BNM-LNE0.280.41
VNIIM-0.050.51
NPL-0.080.28
SMU0.030.26
IMGC-0.325.10
IPQ0.080.47
CSIR-NML0.324.34
GUM0.210.14
NMIJ0.060.25
CMS/ITRI-0.070.16
CSIR-NML0.253.60
KRISS-0.050.18
VNIIM0.120.13
UkrCSM-0.140.22
BelGIM0.861.00
BAM0.090.41

In dark blue: laboratories participant in CCQM-K3
In green: laboratories participant in EUROMET.QM-K3 (indicated as * in "Lab j" list)
In blue: laboratories participant in APMP.QM-K3
In orange: laboratories participant in COOMET.QM-K3

Additional data: pair-wise degrees of equivalence inside APMP.QM-K3 and COOMET.QM-K3:

All results, including relative degrees of equivalence for COOMET participants, are presented under A4 printable format in Summary Results (.PDF file).

CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

NOMINAL VALUES for Propane : ~ 2 mmol/mol

   
Lab iDiUi
 /(mmol/mol)/(mmol/mol)
OMH-0.00060.0034
BAM0.00910.0103
NIST0.00060.0139
NMi-VSL0.00000.0040
NMIJ0.00000.0030
NRCCRM-0.00300.0071
SMU0.00220.0301
KRISS0.00130.0032
PTB-0.00780.0132
METAS-0.01590.0055
BNM-LNE-0.00300.0046
VNIIM-0.00770.0083
NPL0.00500.0066
SMU0.00440.0113
IMGC-0.07400.0720
IPQ0.00020.0055
GUM-0.00060.0066
CMI0.12190.1500
NMIJ-0.00260.0037
CMS/ITRI-0.01150.0171
KRISS0.00210.0045
VNIIM0.0010.004
UkrCSM-0.0010.004
BelGIM-0.0040.020
BAM0.0100.012

In dark blue: laboratories participant in CCQM-K3
In green: laboratories participant in EUROMET.QM-K3 (indicated as * in "Lab j" list)
In blue: laboratories participant in APMP.QM-K3
In orange: laboratories participant in COOMET.QM-K3

Additional data: pair-wise degrees of equivalence inside APMP.QM-K3 and COOMET.QM-K3:

All results, including relative degrees of equivalence for COOMET participants, are presented under A4 printable format in Summary Results (.PDF file).

Comparison
Comparison close
CC comparison
Linked comparison
CCQM-K3
Metrology area, Sub-field Chemistry and Biology, Gases
Description Automotive emission gases
Time of measurements 1998 - 1999
Status Approved for equivalence
Final Reports of the comparisons
Measurand Amount-of-substance fraction of CO (32 mmol/mol), CO2 (135 mmol/mol) and C3H8 (2.05 mmol/mol); N2 balance
Transfer device Calibrated gas cylinders measured by gravimetry
Comparison type Key Comparison
Consultative Committee CCQM (Consultative Committee for Amount of Substance)
Conducted by CCQM (Consultative Committee for Amount of Substance)
Comments

Note that EUROMET.QM-K3 results are linked to CCQM-K3 results.

EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3 results are linked to those of CCQM-K3.

Dates of publication:

  • CCQM-K3 results, 21 November 2001;
  • EUROMET.QM-K3 results, 05 July 2002;
  • APMP.QM-K3 results, 14 November 2003;
  • COOMET.QM-K3 results, 31 August 2006.

Automotive emission gases.

Pilot institute VSL
VSL
Netherlands
Contact person A. van der Veen
avdveen@vsl.nl
+31 15 2691500
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
VSL

VSL, Netherlands, EURAMET

BAM

Bundesanstalt für Materialforschung und -prüfung, Germany, EURAMET

BNM-LNE

Bureau National de Métrologie - Laboratoire National d'Essais, France, EURAMET

KRISS

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

METAS

Federal Institute of Metrology, Switzerland, EURAMET

NIST

National Institute of Standards and Technology, United States, SIM

NMIJ AIST

National Metrology Institute of Japan, Japan, APMP

NMi-VSL

Nederlands Meetinstituut - Van Swinden Laboratorium (became VSL in 2009), Netherlands, EURAMET

NPL

National Physical Laboratory, United Kingdom, EURAMET

NRCCRM

National Research Centre for Certified Reference Materials, merged in NIM (National Institute of Metrology) starting 1st January 2006, China, APMP

OMH

Országos Mérésügyi Hivatal; Subsequently MKEH, now BKFH, Hungary, EURAMET

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

SMU

Slovensky Metrologicky Ustav, Slovakia, EURAMET

VNIIM

D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET

CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

NOMINAL VALUES for Carbon monoxide : 32 mmol/mol for CCQM-K3 and EUROMET.QM-K3, 28 mmol/mol for APMP.QM-K3, and 30 mmol/mol for COOMET.QM-K3

  • Key comparison CCQM-K3

Key comparison reference value: there is no single key comparison reference value for this comparison, the value xigrav is taken as the reference value for laboratory i.

The degree of equivalence of each laboratory i with respect to the reference value is given by a pair of terms: Di = (xi - xigrav) and Ui, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui = 2(ui2 + uigravR2)1/2.

The degree of equivalence between two laboratories i and j is given by a pair of terms:
Dij =(Di - Dj) = (xi - xigrav) - (xj - xjgrav) and Uij, its expanded uncertainty (k = 2), both expressed in mmol/mol, Uij = 2(ui2 + uj2 + uigrav2 + ujgrav2)1/2.
  • Key comparison EUROMET.QM-K3

The gravimetric value xigrav-EUR is taken as the reference value for laboratory i participant in EUROMET.QM-K3.

The degree of equivalence of laboratory i participant in EUROMET.QM-K3 with respect to the reference value is given by a pair of terms:
Di-EUR = (xi-EUR - xigrav-EUR) and Ui-EUR, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui-EUR = 2(ui-EUR2 + uigravR-EUR2)1/2.
  • Key comparison APMP.QM-K3

The gravimetric value xigrav-APMP is taken as the reference value for laboratory i participant in APMP.QM-K3.

The degree of equivalence of laboratory i participant in APMP.QM-K3 with respect to the reference value is given by a pair of terms:
Di-APMP = (xi-APMP - xigrav-APMP) and Ui-APMP, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui-APMP = 2(ui-APMP2 + uigravR-APMP2)1/2.
  • Key comparison COOMET.QM-K3

The gravimetric value xigrav-COO is taken as the reference value for laboratory i participant in COOMET.QM-K3.

The degree of equivalence of laboratory i participant in COOMET.QM-K3 with respect to the reference value is given by a pair of terms:
Di-COO = (xi-COO - xigrav-COO) and Ui-COO, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui-COO = (ULab i-COO2 + UigravR-COO2)1/2 (since uncertainties are all expanded with k = 2). Relative values, expressed in %, are also calculated.
  • Linking EUROMET.QM-K3, APMP.QM-K3, and COOMET.QM-K3 to CCQM-K3

The regional QM-K3 key comparisons are linked to CCQM-K3 through the gravimetric values.

It follows that:

The degrees of equivalence with respect to the reference value obtained in the regional QM-K3 key comparisons are transferred to CCQM-K3 without correction:
Di = Di-RMO and Ui = Ui-RMO, with "RMO" = "EUR" or "APMP" or "COO" according to the case.

The degree of equivalence between two laboratories i and j, one and the other participant in any one of the four comparisons, is given by a pair of terms:
Dij =(Di - Dj) and Uij, its expanded uncertainty (k = 2), both expressed in mmol/mol, Uij = 2(ui2 + uj2 + uigrav2 + ujgrav2)1/2, with indexes "-EUR", "R-APMP", and
"R-COO" when necessary.


These statements make it possible to extend the CCQM-K3 matrices of equivalence to participants in the regional QM-K3 key comparisons.
In the following, not all pair-wise degrees of equivalence are explicitely computed.

CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

NOMINAL VALUES for Carbon dioxide : 135 mmol/mol for CCQM-K3, EUROMET.QM-K3 and COOMET.QM-K3, and 124 mmol/mol for APMP.QM-K3

  • Key comparison CCQM-K3

Key comparison reference value: there is no single key comparison reference value for this comparison, the value xigrav is taken as the reference value for laboratory i.

The degree of equivalence of each laboratory i with respect to the reference value is given by a pair of terms: Di = (xi - xigrav) and Ui, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui = 2(ui2 + uigravR2)1/2.

The degree of equivalence between two laboratories i and j is given by a pair of terms:
Dij =(Di - Dj) = (xi - xigrav) - (xj - xjgrav) and Uij, its expanded uncertainty (k = 2), both expressed in mmol/mol, Uij = 2(ui2 + uj2 + uigrav2 + ujgrav2)1/2.
  • Key comparison EUROMET.QM-K3

The gravimetric value xigrav-EUR is taken as the reference value for laboratory i participant in EUROMET.QM-K3.

The degree of equivalence of laboratory i participant in EUROMET.QM-K3 with respect to the reference value is given by a pair of terms:
Di-EUR = (xi-EUR - xigrav-EUR) and Ui-EUR, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui-EUR = 2(ui-EUR2 + uigravR-EUR2)1/2.
  • Key comparison APMP.QM-K3

The gravimetric value xigrav-APMP is taken as the reference value for laboratory i participant in APMP.QM-K3.

The degree of equivalence of laboratory i participant in APMP.QM-K3 with respect to the reference value is given by a pair of terms:
Di-APMP = (xi-APMP - xigrav-APMP) and Ui-APMP, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui-APMP = 2(ui-APMP2 + uigravR-APMP2)1/2.
  • Key comparison COOMET.QM-K3

The gravimetric value xigrav-COO is taken as the reference value for laboratory i participant in COOMET.QM-K3.

The degree of equivalence of laboratory i participant in COOMET.QM-K3 with respect to the reference value is given by a pair of terms:
Di-COO = (xi-COO - xigrav-COO) and Ui-COO, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui-COO = (ULab i-COO2 + UigravR-COO2)1/2 (since uncertainties are all expanded with k = 2). Relative values, expressed in %, are also calculated.
  • Linking EUROMET.QM-K3, APMP.QM-K3, and COOMET.QM-K3 to CCQM-K3

The regional QM-K3 key comparisons are linked to CCQM-K3 through the gravimetric values.

It follows that:

The degrees of equivalence with respect to the reference value obtained in the regional QM-K3 key comparisons are transferred to CCQM-K3 without correction:
Di = Di-RMO and Ui = Ui-RMO, with "RMO" = "EUR" or "APMP" or "COO" according to the case.

The degree of equivalence between two laboratories i and j, one and the other participant in any one of the four comparisons, is given by a pair of terms:
Dij =(Di - Dj) and Uij, its expanded uncertainty (k = 2), both expressed in mmol/mol, Uij = 2(ui2 + uj2 + uigrav2 + ujgrav2)1/2, with indexes "-EUR", "R-APMP", and
"R-COO" when necessary.


These statements make it possible to extend the CCQM-K3 matrices of equivalence to participants in the regional QM-K3 key comparisons.
In the following, not all pair-wise degrees of equivalence are explicitely computed.

CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

NOMINAL VALUES for Propane : 2.05 mmol/mol for CCQM-K3 and EUROMET.QM-K3, 1.95 mmol/mol for APMP.QM-K3, and 2 mmol/mol for COOMET.QM-K3

  • Key comparison CCQM-K3

Key comparison reference value: there is no single key comparison reference value for this comparison, the value xigrav is taken as the reference value for laboratory i.

The degree of equivalence of each laboratory i with respect to the reference value is given by a pair of terms: Di = (xi - xigrav) and Ui, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui = 2(ui2 + uigravR2)1/2.

The degree of equivalence between two laboratories i and j is given by a pair of terms:
Dij =(Di - Dj) = (xi - xigrav) - (xj - xjgrav) and Uij, its expanded uncertainty (k = 2), both expressed in mmol/mol, Uij = 2(ui2 + uj2 + uigrav2 + ujgrav2)1/2.
  • Key comparison EUROMET.QM-K3

The gravimetric value xigrav-EUR is taken as the reference value for laboratory i participant in EUROMET.QM-K3.

The degree of equivalence of laboratory i participant in EUROMET.QM-K3 with respect to the reference value is given by a pair of terms:
Di-EUR = (xi-EUR - xigrav-EUR) and Ui-EUR, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui-EUR = 2(ui-EUR2 + uigravR-EUR2)1/2.
  • Key comparison APMP.QM-K3

The gravimetric value xigrav-APMP is taken as the reference value for laboratory i participant in APMP.QM-K3.

The degree of equivalence of laboratory i participant in APMP.QM-K3 with respect to the reference value is given by a pair of terms:
Di-APMP = (xi-APMP - xigrav-APMP) and Ui-APMP, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui-APMP = 2(ui-APMP2 + uigravR-APMP2)1/2.
  • Key comparison COOMET.QM-K3

The gravimetric value xigrav-COO is taken as the reference value for laboratory i participant in COOMET.QM-K3.

The degree of equivalence of laboratory i participant in COOMET.QM-K3 with respect to the reference value is given by a pair of terms:
Di-COO = (xi-COO - xigrav-COO) and Ui-COO, its expanded uncertainty (k = 2), both expressed in mmol/mol, Ui-COO = (ULab i-COO2 + UigravR-COO2)1/2 (since uncertainties are all expanded with k = 2). Relative values, expressed in %, are also calculated.
  • Linking EUROMET.QM-K3, APMP.QM-K3, and COOMET.QM-K3 to CCQM-K3

The regional QM-K3 key comparisons are linked to CCQM-K3 through the gravimetric values.

It follows that:

The degrees of equivalence with respect to the reference value obtained in the regional QM-K3 key comparisons are transferred to CCQM-K3 without correction:
Di = Di-RMO and Ui = Ui-RMO, with "RMO" = "EUR" or "APMP" or "COO" according to the case.

The degree of equivalence between two laboratories i and j, one and the other participant in any one of the four comparisons, is given by a pair of terms:
Dij =(Di - Dj) and Uij, its expanded uncertainty (k = 2), both expressed in mmol/mol, Uij = 2(ui2 + uj2 + uigrav2 + ujgrav2)1/2, with indexes "-EUR", "R-APMP", and
"R-COO" when necessary.


These statements make it possible to extend the CCQM-K3 matrices of equivalence to participants in the regional QM-K3 key comparisons.
In the following, not all pair-wise degrees of equivalence are explicitely computed.

CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

  • Key comparison CCQM-K3

NOMINAL VALUES :

Carbon monoxide

32 mmol/mol

Carbon dioxide

135 mmol/mol

Propane

2.05 mmol/mol

Nitrogen

Balance

xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
xigrav : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
uigravR : combined standard uncertainty of xigrav
uigravR = (uigrav2 + uiver2)1/2, where uigrav and uiver are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
uigrav = 0.0002 . xigrav and uiver = 0.0003 . xigrav, both in mmol/mol, for Carbon monoxide,
uigrav = 0.00003 . xigrav and uiver = 0.0003 . xigrav, both in mmol/mol, for Carbon dioxide, and
uigrav = 0.00012 . xigrav and uiver = 0.00056 . xigrav, both in mmol/mol, for Propane.

  • Key comparison EUROMET.QM-K3

NOMINAL VALUES :

Carbon monoxide

32 mmol/mol

Carbon dioxide

135 mmol/mol

Propane

2.05 mmol/mol

Nitrogen

Balance

xi-EUR : result of measurement carried out by laboratory i
ui-EUR : combined standard uncertainty of xi-EUR
xigrav-EUR : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
uigravR-EUR : combined standard uncertainty of xigrav-EUR

u igravR-EUR = (uigrav-EUR2 + uiver-EUR2)1/2, where uigrav-EUR and uiver-EUR are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
uigrav-EUR = 0.0002 . xigrav-EUR and uiver-EUR = 0.0003 . xigrav-EUR , both in mmol/mol, for Carbon monoxide,
uigrav-EUR = 0.00003 . xigrav-EUR and uiver-EUR = 0.0003 . xigrav-EUR , both in mmol/mol, for Carbon dioxide, and
uigrav-EUR = 0.00012 . xigrav-EUR and uiver-EUR = 0.00056 . xigrav-EUR , both in mmol/mol, for Propane.

  • Key comparison APMP.QM-K3

NOMINAL VALUES :

Carbon monoxide

28 mmol/mol

Carbon dioxide

124 mmol/mol

Propane

1.95 mmol/mol

Nitrogen

Balance

xi-APMP : result of measurement carried out by laboratory i
ui-APMP : combined standard uncertainty of xi-APMP
xigrav-APMP : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
uigravR-APMP : combined standard uncertainty of xigrav-APMP

uigravR-APMP = (uigrav-APMP2 + uiver-APMP2)1/2, where uigrav-APMP and
uiver-APMP are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value.
The relative expanded uncertainty (k=2) linked to the verification process is estimated to be equal to 0.10%.

  • Key comparison COOMET.QM-K3

NOMINAL VALUES :

Carbon monoxide

30 mmol/mol

Carbon dioxide

135 mmol/mol

Propane

2 mmol/mol

Nitrogen

Balance

xi-COO : result of measurement carried out by laboratory i
ULab i-COO : expanded uncertainty (k = 2) of xi-COO
xigrav-COO : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
UigravR-COO : expanded uncertainty (k = 2) of xigrav-COO

UigravR-COO / 2 = (uigrav-COO2 + uiver-COO2)1/2, where uigrav-COO and
uiver-COO are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value.

CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

  • Key comparison CCQM-K3

NOMINAL VALUES :

Carbon monoxide

32 mmol/mol

Carbon dioxide

135 mmol/mol

Propane

2.05 mmol/mol

Nitrogen

Balance

xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
xigrav : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
uigravR : combined standard uncertainty of xigrav
uigravR = (uigrav2 + uiver2)1/2, where uigrav and uiver are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
uigrav = 0.0002 . xigrav and uiver = 0.0003 . xigrav, both in mmol/mol, for Carbon monoxide,
uigrav = 0.00003 . xigrav and uiver = 0.0003 . xigrav, both in mmol/mol, for Carbon dioxide, and
uigrav = 0.00012 . xigrav and uiver = 0.00056 . xigrav, both in mmol/mol, for Propane.

  • Key comparison EUROMET.QM-K3

NOMINAL VALUES :

Carbon monoxide

32 mmol/mol

Carbon dioxide

135 mmol/mol

Propane

2.05 mmol/mol

Nitrogen

Balance

xi-EUR : result of measurement carried out by laboratory i
ui-EUR : combined standard uncertainty of xi-EUR
xigrav-EUR : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
uigravR-EUR : combined standard uncertainty of xigrav-EUR

u igravR-EUR = (uigrav-EUR2 + uiver-EUR2)1/2, where uigrav-EUR and uiver-EUR are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
uigrav-EUR = 0.0002 . xigrav-EUR and uiver-EUR = 0.0003 . xigrav-EUR , both in mmol/mol, for Carbon monoxide,
uigrav-EUR = 0.00003 . xigrav-EUR and uiver-EUR = 0.0003 . xigrav-EUR , both in mmol/mol, for Carbon dioxide, and
uigrav-EUR = 0.00012 . xigrav-EUR and uiver-EUR = 0.00056 . xigrav-EUR , both in mmol/mol, for Propane.

  • Key comparison APMP.QM-K3

NOMINAL VALUES :

Carbon monoxide

28 mmol/mol

Carbon dioxide

124 mmol/mol

Propane

1.95 mmol/mol

Nitrogen

Balance

xi-APMP : result of measurement carried out by laboratory i
ui-APMP : combined standard uncertainty of xi-APMP
xigrav-APMP : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
uigravR-APMP : combined standard uncertainty of xigrav-APMP

uigravR-APMP = (uigrav-APMP2 + uiver-APMP2)1/2, where uigrav-APMP and
uiver-APMP are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value.
The relative expanded uncertainty (k=2) linked to the verification process is estimated to be equal to 0.10%.

  • Key comparison COOMET.QM-K3

NOMINAL VALUES :

Carbon monoxide

30 mmol/mol

Carbon dioxide

135 mmol/mol

Propane

2 mmol/mol

Nitrogen

Balance

xi-COO : result of measurement carried out by laboratory i
ULab i-COO : expanded uncertainty (k = 2) of xi-COO
xigrav-COO : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
UigravR-COO : expanded uncertainty (k = 2) of xigrav-COO

UigravR-COO / 2 = (uigrav-COO2 + uiver-COO2)1/2, where uigrav-COO and
uiver-COO are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value.

CCQM-K3, EUROMET.QM-K3, APMP.QM-K3 and COOMET.QM-K3

MEASURAND : Amount-of-substance fraction of automotive emission gases

  • Key comparison CCQM-K3

NOMINAL VALUES :

Carbon monoxide

32 mmol/mol

Carbon dioxide

135 mmol/mol

Propane

2.05 mmol/mol

Nitrogen

Balance

xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
xigrav : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
uigravR : combined standard uncertainty of xigrav
uigravR = (uigrav2 + uiver2)1/2, where uigrav and uiver are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
uigrav = 0.0002 . xigrav and uiver = 0.0003 . xigrav, both in mmol/mol, for Carbon monoxide,
uigrav = 0.00003 . xigrav and uiver = 0.0003 . xigrav, both in mmol/mol, for Carbon dioxide, and
uigrav = 0.00012 . xigrav and uiver = 0.00056 . xigrav, both in mmol/mol, for Propane.

  • Key comparison EUROMET.QM-K3

NOMINAL VALUES :

Carbon monoxide

32 mmol/mol

Carbon dioxide

135 mmol/mol

Propane

2.05 mmol/mol

Nitrogen

Balance

xi-EUR : result of measurement carried out by laboratory i
ui-EUR : combined standard uncertainty of xi-EUR
xigrav-EUR : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
uigravR-EUR : combined standard uncertainty of xigrav-EUR

u igravR-EUR = (uigrav-EUR2 + uiver-EUR2)1/2, where uigrav-EUR and uiver-EUR are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
uigrav-EUR = 0.0002 . xigrav-EUR and uiver-EUR = 0.0003 . xigrav-EUR , both in mmol/mol, for Carbon monoxide,
uigrav-EUR = 0.00003 . xigrav-EUR and uiver-EUR = 0.0003 . xigrav-EUR , both in mmol/mol, for Carbon dioxide, and
uigrav-EUR = 0.00012 . xigrav-EUR and uiver-EUR = 0.00056 . xigrav-EUR , both in mmol/mol, for Propane.

  • Key comparison APMP.QM-K3

NOMINAL VALUES :

Carbon monoxide

28 mmol/mol

Carbon dioxide

124 mmol/mol

Propane

1.95 mmol/mol

Nitrogen

Balance

xi-APMP : result of measurement carried out by laboratory i
ui-APMP : combined standard uncertainty of xi-APMP
xigrav-APMP : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
uigravR-APMP : combined standard uncertainty of xigrav-APMP

uigravR-APMP = (uigrav-APMP2 + uiver-APMP2)1/2, where uigrav-APMP and
uiver-APMP are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value.
The relative expanded uncertainty (k=2) linked to the verification process is estimated to be equal to 0.10%.

  • Key comparison COOMET.QM-K3

NOMINAL VALUES :

Carbon monoxide

30 mmol/mol

Carbon dioxide

135 mmol/mol

Propane

2 mmol/mol

Nitrogen

Balance

xi-COO : result of measurement carried out by laboratory i
ULab i-COO : expanded uncertainty (k = 2) of xi-COO
xigrav-COO : gravimetric value of the gas amount-of-substance fraction in the cylinder received by laboratory i
UigravR-COO : expanded uncertainty (k = 2) of xigrav-COO

UigravR-COO / 2 = (uigrav-COO2 + uiver-COO2)1/2, where uigrav-COO and
uiver-COO are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value.