CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES for Carbon monoxide : ~ 30 mmol/mol
Degrees of equivalence D_{i} and expanded uncertainty U_{i} (k = 2) expressed in mmol/mol
Please click onto the graph to get an enlarged version.
Red diamonds: participants in CCQMK3
Green triangles: participants in EUROMET.QMK3
Blue circles: participants in APMP.QMK3
Orange squares: participants in COOMET.QMK3
CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES for Carbon dioxide : ~ 135 mmol/mol
Degrees of equivalence D_{i} and expanded uncertainty U_{i} (k = 2) expressed in mmol/mol
Please click onto the graph to get an enlarged version.
Red diamonds: participants in CCQMK3
Green triangles: participants in EUROMET.QMK3
Blue circles: participants in APMP.QMK3
Orange squares: participants in COOMET.QMK3
CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES for Propane : ~ 2 mmol/mol
Degrees of equivalence D_{i} and expanded uncertainty U_{i} (k = 2) expressed in mmol/mol
Please click onto the graph to get an enlarged version.
Red diamonds: participants in CCQMK3
Green triangles: participants in EUROMET.QMK3
Blue circles: participants in APMP.QMK3
Orange squares: participants in COOMET.QMK3
CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES for Carbon monoxide : ~ 30 mmol/mol
Lab i  D_{i}  U_{i} 
/(mmol/mol)  /(mmol/mol)  
OMH  0.018  0.038 
BAM  0.037  0.162 
NIST  0.020  0.209 
NMiVSL  0.028  0.122 
NMIJ  0.040  0.059 
NRCCRM  0.040  0.109 
SMU  0.225  0.094 
KRISS  0.015  0.034 
PTB  0.026  0.067 
METAS  0.026  0.074 
BNMLNE  0.282  0.301 
VNIIM  0.293  0.181 
NPL  0.015  0.068 
SMU  0.014  0.096 
IPQ  0.027  0.112 
CSIRNML  0.260  0.461 
GUM  0.005  0.112 
CMI  0.652  4.400 
NMIJ  0.01  0.12 
CMS/ITRI  0.07  0.05 
CSIRNML  0.06  1.60 
KRISS  0.04  0.06 
VNIIM  0.01  0.06 
UkrCSM  0.11  0.12 
BelGIM  0.06  0.20 
BAM  0.04  0.15 
In dark blue: laboratories participant in CCQMK3
In green: laboratories participant in EUROMET.QMK3 (indicated as * in "Lab j" list)
In blue: laboratories participant in APMP.QMK3
In orange: laboratories participant in COOMET.QMK3
Additional data: pairwise degrees of equivalence inside APMP.QMK3 and COOMET.QMK3:
All results, including relative degrees of equivalence for COOMET participants, are presented under A4 printable format in Summary Results (.PDF file).
CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES for Carbon dioxide : ~ 135 mmol/mol
Lab i  D_{i}  U_{i} 
/(mmol/mol)  /(mmol/mol)  
OMH  0.15  0.14 
BAM  0.01  0.70 
NIST  0.17  0.24 
NMiVSL  0.02  0.23 
NMIJ  0.01  0.13 
NRCCRM  0.06  0.47 
SMU  0.71  0.56 
KRISS  0.02  0.09 
PTB  0.30  0.18 
METAS  0.08  0.31 
BNMLNE  0.28  0.41 
VNIIM  0.05  0.51 
NPL  0.08  0.28 
SMU  0.03  0.26 
IMGC  0.32  5.10 
IPQ  0.08  0.47 
CSIRNML  0.32  4.34 
GUM  0.21  0.14 
NMIJ  0.06  0.25 
CMS/ITRI  0.07  0.16 
CSIRNML  0.25  3.60 
KRISS  0.05  0.18 
VNIIM  0.12  0.13 
UkrCSM  0.14  0.22 
BelGIM  0.86  1.00 
BAM  0.09  0.41 
In dark blue: laboratories participant in CCQMK3
In green: laboratories participant in EUROMET.QMK3 (indicated as * in "Lab j" list)
In blue: laboratories participant in APMP.QMK3
In orange: laboratories participant in COOMET.QMK3
Additional data: pairwise degrees of equivalence inside APMP.QMK3 and COOMET.QMK3:
All results, including relative degrees of equivalence for COOMET participants, are presented under A4 printable format in Summary Results (.PDF file).
CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES for Propane : ~ 2 mmol/mol
Lab i  D_{i}  U_{i} 
/(mmol/mol)  /(mmol/mol)  
OMH  0.0006  0.0034 
BAM  0.0091  0.0103 
NIST  0.0006  0.0139 
NMiVSL  0.0000  0.0040 
NMIJ  0.0000  0.0030 
NRCCRM  0.0030  0.0071 
SMU  0.0022  0.0301 
KRISS  0.0013  0.0032 
PTB  0.0078  0.0132 
METAS  0.0159  0.0055 
BNMLNE  0.0030  0.0046 
VNIIM  0.0077  0.0083 
NPL  0.0050  0.0066 
SMU  0.0044  0.0113 
IMGC  0.0740  0.0720 
IPQ  0.0002  0.0055 
GUM  0.0006  0.0066 
CMI  0.1219  0.1500 
NMIJ  0.0026  0.0037 
CMS/ITRI  0.0115  0.0171 
KRISS  0.0021  0.0045 
VNIIM  0.001  0.004 
UkrCSM  0.001  0.004 
BelGIM  0.004  0.020 
BAM  0.010  0.012 
In dark blue: laboratories participant in CCQMK3
In green: laboratories participant in EUROMET.QMK3 (indicated as * in "Lab j" list)
In blue: laboratories participant in APMP.QMK3
In orange: laboratories participant in COOMET.QMK3
Additional data: pairwise degrees of equivalence inside APMP.QMK3 and COOMET.QMK3:
All results, including relative degrees of equivalence for COOMET participants, are presented under A4 printable format in Summary Results (.PDF file).
Metrology area, Subfield  Chemistry and Biology, Gases 
Description  Automotive emission gases 
Time of measurements  2000 
Status  Approved for equivalence 
Final Reports of the comparisons  
Measurand  Amountofsubstance fraction of CO (32 mmol/mol), CO_{2} (135 mmol/mol) and C_{3}H_{8} (2.05 mmol/mol); N_{2} balance 
Transfer device  Calibrated gas cylinders measured by gravimetry 
Comparison type  Key Comparison 
Consultative Committee  CCQM (Consultative Committee for Amount of Substance) 
Conducted by  EURAMET (European Association of National Metrology Institutes) 
RMO Internal Identifier  EUROMET Project No 485 
Comments  EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3 results are linked to those of CCQMK3. Dates of publication:
Automotive emission gases. 
Pilot institute 
VSL
VSL Netherlands 
Contact person  A. van der Veen +31 15 2691500 
This page proposes printout on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
Please, select items to be printed out, then click on "OK" :
CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES for Carbon monoxide : 32 mmol/mol for CCQMK3 and EUROMET.QMK3, 28 mmol/mol for APMP.QMK3, and 30 mmol/mol for COOMET.QMK3
Key comparison reference value: there is no single key comparison reference value for this comparison, the value x_{igrav} 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: D_{i} = (x_{i}  x_{igrav}) and U_{i}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{i} = 2(u_{i}^{2} + u_{igravR}^{2})^{1/2}. 
The degree of equivalence between two laboratories i and j is given by a pair of terms: D_{ij} =(D_{i}  D_{j}) = (x_{i}  x_{igrav})  (x_{j}  x_{jgrav}) and U_{ij}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{ij} = 2(u_{i}^{2} + u_{j}^{2 + }u_{i}_{grav}^{2 }+ u_{jgrav}^{2})^{1/2}. 
The gravimetric value x_{igravEUR} is taken as the reference value for laboratory i participant in EUROMET.QMK3. 
The degree of equivalence of laboratory i participant in EUROMET.QMK3 with respect to the reference value is given by a pair of terms: D_{iEUR} = (x_{iEUR}  x_{igravEUR}) and U_{iEUR}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{iEUR} = 2(u_{iEUR}^{2} + u_{igravREUR}^{2})^{1/2}. 
The gravimetric value x_{igravAPMP} is taken as the reference value for laboratory i participant in APMP.QMK3. 
The degree of equivalence of laboratory i participant in APMP.QMK3 with respect to the reference value is given by a pair of terms: D_{iAPMP} = (x_{iAPMP}  x_{igravAPMP}) and U_{iAPMP}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{iAPMP} = 2(u_{iAPMP}^{2} + u_{igravRAPMP}^{2})^{1/2}. 
The gravimetric value x_{igravCOO} is taken as the reference value for laboratory i participant in COOMET.QMK3. 
The degree of equivalence of laboratory i participant in COOMET.QMK3 with respect to the reference value is given by a pair of terms: D_{iCOO} = (x_{iCOO}  x_{igravCOO}) and U_{iCOO}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{iCOO} = (U_{Lab iCOO}^{2} + U_{igravRCOO}^{2})^{1/2} (since uncertainties are all expanded with k = 2). Relative values, expressed in %, are also calculated. 
The regional QMK3 key comparisons are linked to CCQMK3 through the gravimetric values. It follows that: 
The degrees of equivalence with respect to the reference value obtained in the regional QMK3 key comparisons are transferred to CCQMK3 without correction: D_{i} = D_{iRMO} and U_{i} = U_{iRMO}, 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: 
These statements make it possible to extend the CCQMK3 matrices of equivalence to participants in the regional QMK3 key comparisons. In the following, not all pairwise degrees of equivalence are explicitely computed. 
CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES for Carbon dioxide : 135 mmol/mol for CCQMK3, EUROMET.QMK3 and COOMET.QMK3, and 124 mmol/mol for APMP.QMK3
Key comparison reference value: there is no single key comparison reference value for this comparison, the value x_{igrav} 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: D_{i} = (x_{i}  x_{igrav}) and U_{i}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{i} = 2(u_{i}^{2} + u_{igravR}^{2})^{1/2}. 
The degree of equivalence between two laboratories i and j is given by a pair of terms: D_{ij} =(D_{i}  D_{j}) = (x_{i}  x_{igrav})  (x_{j}  x_{jgrav}) and U_{ij}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{ij} = 2(u_{i}^{2} + u_{j}^{2 + }u_{i}_{grav}^{2 }+ u_{jgrav}^{2})^{1/2}. 
The gravimetric value x_{igravEUR} is taken as the reference value for laboratory i participant in EUROMET.QMK3. 
The degree of equivalence of laboratory i participant in EUROMET.QMK3 with respect to the reference value is given by a pair of terms: D_{iEUR} = (x_{iEUR}  x_{igravEUR}) and U_{iEUR}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{iEUR} = 2(u_{iEUR}^{2} + u_{igravREUR}^{2})^{1/2}. 
The gravimetric value x_{igravAPMP} is taken as the reference value for laboratory i participant in APMP.QMK3. 
The degree of equivalence of laboratory i participant in APMP.QMK3 with respect to the reference value is given by a pair of terms: D_{iAPMP} = (x_{iAPMP}  x_{igravAPMP}) and U_{iAPMP}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{iAPMP} = 2(u_{iAPMP}^{2} + u_{igravRAPMP}^{2})^{1/2}. 
The gravimetric value x_{igravCOO} is taken as the reference value for laboratory i participant in COOMET.QMK3. 
The degree of equivalence of laboratory i participant in COOMET.QMK3 with respect to the reference value is given by a pair of terms: D_{iCOO} = (x_{iCOO}  x_{igravCOO}) and U_{iCOO}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{iCOO} = (U_{Lab iCOO}^{2} + U_{igravRCOO}^{2})^{1/2} (since uncertainties are all expanded with k = 2). Relative values, expressed in %, are also calculated. 
The regional QMK3 key comparisons are linked to CCQMK3 through the gravimetric values. It follows that: 
The degrees of equivalence with respect to the reference value obtained in the regional QMK3 key comparisons are transferred to CCQMK3 without correction: D_{i} = D_{iRMO} and U_{i} = U_{iRMO}, 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: 
These statements make it possible to extend the CCQMK3 matrices of equivalence to participants in the regional QMK3 key comparisons. In the following, not all pairwise degrees of equivalence are explicitely computed. 
CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES for Propane : 2.05 mmol/mol for CCQMK3 and EUROMET.QMK3, 1.95 mmol/mol for APMP.QMK3, and 2 mmol/mol for COOMET.QMK3
Key comparison reference value: there is no single key comparison reference value for this comparison, the value x_{igrav} 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: D_{i} = (x_{i}  x_{igrav}) and U_{i}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{i} = 2(u_{i}^{2} + u_{igravR}^{2})^{1/2}. 
The degree of equivalence between two laboratories i and j is given by a pair of terms: D_{ij} =(D_{i}  D_{j}) = (x_{i}  x_{igrav})  (x_{j}  x_{jgrav}) and U_{ij}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{ij} = 2(u_{i}^{2} + u_{j}^{2 + }u_{i}_{grav}^{2 }+ u_{jgrav}^{2})^{1/2}. 
The gravimetric value x_{igravEUR} is taken as the reference value for laboratory i participant in EUROMET.QMK3. 
The degree of equivalence of laboratory i participant in EUROMET.QMK3 with respect to the reference value is given by a pair of terms: D_{iEUR} = (x_{iEUR}  x_{igravEUR}) and U_{iEUR}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{iEUR} = 2(u_{iEUR}^{2} + u_{igravREUR}^{2})^{1/2}. 
The gravimetric value x_{igravAPMP} is taken as the reference value for laboratory i participant in APMP.QMK3. 
The degree of equivalence of laboratory i participant in APMP.QMK3 with respect to the reference value is given by a pair of terms: D_{iAPMP} = (x_{iAPMP}  x_{igravAPMP}) and U_{iAPMP}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{iAPMP} = 2(u_{iAPMP}^{2} + u_{igravRAPMP}^{2})^{1/2}. 
The gravimetric value x_{igravCOO} is taken as the reference value for laboratory i participant in COOMET.QMK3. 
The degree of equivalence of laboratory i participant in COOMET.QMK3 with respect to the reference value is given by a pair of terms: D_{iCOO} = (x_{iCOO}  x_{igravCOO}) and U_{iCOO}, its expanded uncertainty (k = 2), both expressed in mmol/mol, U_{iCOO} = (U_{Lab iCOO}^{2} + U_{igravRCOO}^{2})^{1/2} (since uncertainties are all expanded with k = 2). Relative values, expressed in %, are also calculated. 
The regional QMK3 key comparisons are linked to CCQMK3 through the gravimetric values. It follows that: 
The degrees of equivalence with respect to the reference value obtained in the regional QMK3 key comparisons are transferred to CCQMK3 without correction: D_{i} = D_{iRMO} and U_{i} = U_{iRMO}, 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: 
These statements make it possible to extend the CCQMK3 matrices of equivalence to participants in the regional QMK3 key comparisons. In the following, not all pairwise degrees of equivalence are explicitely computed. 
CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES : 
Carbon monoxide 
32 mmol/mol 
Carbon dioxide 
135 mmol/mol 

Propane 
2.05 mmol/mol 

Nitrogen 
Balance 
x_{i} : result of measurement carried out by laboratory i
u_{i} : combined standard uncertainty of x_{i}
x_{i}_{grav} : gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
u_{i}_{gravR} : combined standard uncertainty of x_{i}_{grav}
u_{i}_{gravR} = (u_{i}_{grav}^{2} + u_{i}_{ver}^{2})^{1/2}, where u_{igrav} and u_{iver} are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
u_{igrav} = 0.0002 . x_{igrav} and u_{iver} = 0.0003 . x_{igrav}, both in mmol/mol, for Carbon monoxide,
u_{igrav} = 0.00003 . x_{igrav} and u_{iver} = 0.0003 . x_{igrav}, both in mmol/mol, for Carbon dioxide, and
u_{igrav} = 0.00012 . x_{igrav} and u_{iver} = 0.00056 . x_{igrav}, both in mmol/mol, for Propane.
NOMINAL VALUES : 
Carbon monoxide 
32 mmol/mol 
Carbon dioxide 
135 mmol/mol 

Propane 
2.05 mmol/mol 

Nitrogen 
Balance 
x_{i}_{EUR}_{ }: result of measurement carried out by laboratory i
u_{i}_{EUR}_{ }: combined standard uncertainty of x_{i}_{}EUR
x_{i}_{gravEUR}_{ }: gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
u_{i}_{gravREUR}_{ }: combined standard uncertainty of x_{i}_{gravEUR}
u _{i}_{gravREUR} = (u_{igravEUR}^{2} + u_{i}_{verEUR}^{2})^{1/2}, where u_{i}_{gravEUR }and u_{i}_{verEUR }are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
u_{igravEUR }= 0.0002 . x_{i}_{gravEUR} and u_{i}_{verEUR }= 0.0003 . x_{i}_{gravEUR}_{} , both in mmol/mol, for Carbon monoxide,
u_{igravEUR }= 0.00003 . x_{i}_{gravEUR}_{} and u_{i}_{verEUR }= 0.0003 . x_{i}_{gravEUR} , both in mmol/mol, for Carbon dioxide, and
u_{igravEUR }= 0.00012 . x_{i}_{gravEUR} and u_{i}_{verEUR }= 0.00056 . x_{i}_{gravEUR} , both in mmol/mol, for Propane.
NOMINAL VALUES : 
Carbon monoxide 
28 mmol/mol 
Carbon dioxide 
124 mmol/mol 

Propane 
1.95 mmol/mol 

Nitrogen 
Balance 
x_{i}_{APMP}_{ }: result of measurement carried out by laboratory i
u_{i}_{APMP}_{ }: combined standard uncertainty of x_{i}_{}APMP
x_{i}_{gravAPMP}_{ }: gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
u_{i}_{gravRAPMP}_{ }: combined standard uncertainty of x_{i}_{gravAPMP}
u_{i}_{gravRAPMP} = (u_{igravAPMP}^{2} + u_{i}_{verAPMP}^{2})^{1/2}, where u_{i}_{gravAPMP }and
u_{i}_{verAPMP }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%.
NOMINAL VALUES : 
Carbon monoxide 
30 mmol/mol 
Carbon dioxide 
135 mmol/mol 

Propane 
2 mmol/mol 

Nitrogen 
Balance 
x_{i}_{COO}_{ }: result of measurement carried out by laboratory i
U_{Lab iCOO}_{ }: expanded uncertainty (k = 2) of x_{i}_{}COO
x_{i}_{gravCOO}_{ }: gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
U_{i}_{gravRCOO}_{ }: expanded uncertainty (k = 2) of x_{i}_{gravCOO}
U_{i}_{gravRCOO} / 2 = (u_{igravCOO}^{2} + u_{i}_{verCOO}^{2})^{1/2}, where u_{i}_{gravCOO }and
u_{i}_{verCOO }are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value.
CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES : 
Carbon monoxide 
32 mmol/mol 
Carbon dioxide 
135 mmol/mol 

Propane 
2.05 mmol/mol 

Nitrogen 
Balance 
x_{i} : result of measurement carried out by laboratory i
u_{i} : combined standard uncertainty of x_{i}
x_{i}_{grav} : gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
u_{i}_{gravR} : combined standard uncertainty of x_{i}_{grav}
u_{i}_{gravR} = (u_{i}_{grav}^{2} + u_{i}_{ver}^{2})^{1/2}, where u_{igrav} and u_{iver} are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
u_{igrav} = 0.0002 . x_{igrav} and u_{iver} = 0.0003 . x_{igrav}, both in mmol/mol, for Carbon monoxide,
u_{igrav} = 0.00003 . x_{igrav} and u_{iver} = 0.0003 . x_{igrav}, both in mmol/mol, for Carbon dioxide, and
u_{igrav} = 0.00012 . x_{igrav} and u_{iver} = 0.00056 . x_{igrav}, both in mmol/mol, for Propane.
NOMINAL VALUES : 
Carbon monoxide 
32 mmol/mol 
Carbon dioxide 
135 mmol/mol 

Propane 
2.05 mmol/mol 

Nitrogen 
Balance 
x_{i}_{EUR}_{ }: result of measurement carried out by laboratory i
u_{i}_{EUR}_{ }: combined standard uncertainty of x_{i}_{}EUR
x_{i}_{gravEUR}_{ }: gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
u_{i}_{gravREUR}_{ }: combined standard uncertainty of x_{i}_{gravEUR}
u _{i}_{gravREUR} = (u_{igravEUR}^{2} + u_{i}_{verEUR}^{2})^{1/2}, where u_{i}_{gravEUR }and u_{i}_{verEUR }are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
u_{igravEUR }= 0.0002 . x_{i}_{gravEUR} and u_{i}_{verEUR }= 0.0003 . x_{i}_{gravEUR}_{} , both in mmol/mol, for Carbon monoxide,
u_{igravEUR }= 0.00003 . x_{i}_{gravEUR}_{} and u_{i}_{verEUR }= 0.0003 . x_{i}_{gravEUR} , both in mmol/mol, for Carbon dioxide, and
u_{igravEUR }= 0.00012 . x_{i}_{gravEUR} and u_{i}_{verEUR }= 0.00056 . x_{i}_{gravEUR} , both in mmol/mol, for Propane.
NOMINAL VALUES : 
Carbon monoxide 
28 mmol/mol 
Carbon dioxide 
124 mmol/mol 

Propane 
1.95 mmol/mol 

Nitrogen 
Balance 
x_{i}_{APMP}_{ }: result of measurement carried out by laboratory i
u_{i}_{APMP}_{ }: combined standard uncertainty of x_{i}_{}APMP
x_{i}_{gravAPMP}_{ }: gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
u_{i}_{gravRAPMP}_{ }: combined standard uncertainty of x_{i}_{gravAPMP}
u_{i}_{gravRAPMP} = (u_{igravAPMP}^{2} + u_{i}_{verAPMP}^{2})^{1/2}, where u_{i}_{gravAPMP }and
u_{i}_{verAPMP }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%.
NOMINAL VALUES : 
Carbon monoxide 
30 mmol/mol 
Carbon dioxide 
135 mmol/mol 

Propane 
2 mmol/mol 

Nitrogen 
Balance 
x_{i}_{COO}_{ }: result of measurement carried out by laboratory i
U_{Lab iCOO}_{ }: expanded uncertainty (k = 2) of x_{i}_{}COO
x_{i}_{gravCOO}_{ }: gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
U_{i}_{gravRCOO}_{ }: expanded uncertainty (k = 2) of x_{i}_{gravCOO}
U_{i}_{gravRCOO} / 2 = (u_{igravCOO}^{2} + u_{i}_{verCOO}^{2})^{1/2}, where u_{i}_{gravCOO }and
u_{i}_{verCOO }are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value.
CCQMK3 was placed in the KCDB archives on 18 September 2023
CCQMK3, EUROMET.QMK3, APMP.QMK3 and COOMET.QMK3
MEASURAND : Amountofsubstance fraction of automotive emission gases
NOMINAL VALUES : 
Carbon monoxide 
32 mmol/mol 
Carbon dioxide 
135 mmol/mol 

Propane 
2.05 mmol/mol 

Nitrogen 
Balance 
x_{i} : result of measurement carried out by laboratory i
u_{i} : combined standard uncertainty of x_{i}
x_{i}_{grav} : gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
u_{i}_{gravR} : combined standard uncertainty of x_{i}_{grav}
u_{i}_{gravR} = (u_{i}_{grav}^{2} + u_{i}_{ver}^{2})^{1/2}, where u_{igrav} and u_{iver} are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
u_{igrav} = 0.0002 . x_{igrav} and u_{iver} = 0.0003 . x_{igrav}, both in mmol/mol, for Carbon monoxide,
u_{igrav} = 0.00003 . x_{igrav} and u_{iver} = 0.0003 . x_{igrav}, both in mmol/mol, for Carbon dioxide, and
u_{igrav} = 0.00012 . x_{igrav} and u_{iver} = 0.00056 . x_{igrav}, both in mmol/mol, for Propane.
NOMINAL VALUES : 
Carbon monoxide 
32 mmol/mol 
Carbon dioxide 
135 mmol/mol 

Propane 
2.05 mmol/mol 

Nitrogen 
Balance 
x_{i}_{EUR}_{ }: result of measurement carried out by laboratory i
u_{i}_{EUR}_{ }: combined standard uncertainty of x_{i}_{}EUR
x_{i}_{gravEUR}_{ }: gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
u_{i}_{gravREUR}_{ }: combined standard uncertainty of x_{i}_{gravEUR}
u _{i}_{gravREUR} = (u_{igravEUR}^{2} + u_{i}_{verEUR}^{2})^{1/2}, where u_{i}_{gravEUR }and u_{i}_{verEUR }are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value, with
u_{igravEUR }= 0.0002 . x_{i}_{gravEUR} and u_{i}_{verEUR }= 0.0003 . x_{i}_{gravEUR}_{} , both in mmol/mol, for Carbon monoxide,
u_{igravEUR }= 0.00003 . x_{i}_{gravEUR}_{} and u_{i}_{verEUR }= 0.0003 . x_{i}_{gravEUR} , both in mmol/mol, for Carbon dioxide, and
u_{igravEUR }= 0.00012 . x_{i}_{gravEUR} and u_{i}_{verEUR }= 0.00056 . x_{i}_{gravEUR} , both in mmol/mol, for Propane.
NOMINAL VALUES : 
Carbon monoxide 
28 mmol/mol 
Carbon dioxide 
124 mmol/mol 

Propane 
1.95 mmol/mol 

Nitrogen 
Balance 
x_{i}_{APMP}_{ }: result of measurement carried out by laboratory i
u_{i}_{APMP}_{ }: combined standard uncertainty of x_{i}_{}APMP
x_{i}_{gravAPMP}_{ }: gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
u_{i}_{gravRAPMP}_{ }: combined standard uncertainty of x_{i}_{gravAPMP}
u_{i}_{gravRAPMP} = (u_{igravAPMP}^{2} + u_{i}_{verAPMP}^{2})^{1/2}, where u_{i}_{gravAPMP }and
u_{i}_{verAPMP }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%.
NOMINAL VALUES : 
Carbon monoxide 
30 mmol/mol 
Carbon dioxide 
135 mmol/mol 

Propane 
2 mmol/mol 

Nitrogen 
Balance 
x_{i}_{COO}_{ }: result of measurement carried out by laboratory i
U_{Lab iCOO}_{ }: expanded uncertainty (k = 2) of x_{i}_{}COO
x_{i}_{gravCOO}_{ }: gravimetric value of the gas amountofsubstance fraction in the cylinder received by laboratory i
U_{i}_{gravRCOO}_{ }: expanded uncertainty (k = 2) of x_{i}_{gravCOO}
U_{i}_{gravRCOO} / 2 = (u_{igravCOO}^{2} + u_{i}_{verCOO}^{2})^{1/2}, where u_{i}_{gravCOO }and
u_{i}_{verCOO }are respectively the combined standard uncertainties of the gravimetric production process and of the analytical verification of the gravimetric value.