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CCQM-K120

MEASURAND: Amount carbon dioxide in air
NOMINAL VALUE: 380 µmol/mol

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

 

 

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CCQM-K120 and COOMET.QM-K120

 

MEASURAND   Carbon dioxide amount fraction in air

NOMINAL VALUE 480 µmol/mol

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in µmol/mol. n COOMET.QM-K120, xR is provided from VNIIM from CCQM-K120.

480 µmol/mol
Di /µmol/mol
Participating institutes

Linking of COOMET.QM-K120 to CCQM-K120 has been provided by VNIIM.

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CCQM-K120 and COOMET.QM-K120

 

MEASURAND   Carbon dioxide amount fraction in air

NOMINAL VALUE 800 µmol/mol

Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in µmol/mol. 

480 µmol/mol
Di /µmol/mol
Participating institutes

VNIIM provided the link between CCQM-K120 and COOMET.QM-K120.

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CCQM-K120

MEASURAND: Amount carbon dioxide in air
NOMINAL VALUE: 380 µmol/mol

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

 

 

Results are presented under A4 printable format in Summary Results (.PDF file).

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CCQM-K120 and COOMET.QM-K120

 

MEASURAND   Carbon dioxide amount fraction in air

NOMINAL VALUE 480 µmol/mol

Degrees of equivalence represented by Di = (xI - xR,i) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in µmol/mol. n COOMET.QM-K120, xR is provided from VNIIM from CCQM-K120.

LABi Di Uneg,i Upos,i
 µmol/mol
 µmol/mol
 µmol/mol
GUM 0.39 5.20
INRIM 0.29 1.64
KRISS 0.15 0.23
LNE 0.20 1.01
NIM -0.05 0.30
NMIJ -0.05 0.20
NMISA 0.46 1.61
NOAA -0.10 0.28
NPL 0.04 0.26
VNIIM 0.04 0.18
VSL -0.04 0.37
UME -0.12 0.30
BFKH 14.99 2.12
NIST -0.87 0.45
NPLI -0.34 3.04
BelGIM 0.20 0.70
KazStandart 0.02 2.43
NMC, A*STAR -0.32 0.77
SE "Ukrmetrteststandart" 1.91 0.97
VNIIM 0.035 0.175
Participating institutes
CCQM-K120
COOMET.QM-K120

The linking of the COOMET.QM-K120 to CCQM-K120 has been provided by VNIIM.

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CCQM-K120 and COOMET.QM-K120

 

MEASURAND   Carbon dioxide amount fraction in air

NOMINAL VALUE 800 µmol/mol

Degrees of equivalence represented by Di  and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in µmol/mol. 

LABi Di Uneg,i Upos,i
 µmol/mol
 µmol/mol
 µmol/mol
GUM 0.40 8.60
INRIM 0.51 2.61
KRISS 0.28 0.46
LNE 0.10 1.71
NIM -0.04 0.24
NMIJ -0.04 0.45
NMISA 0.91 1.03
NOAA 0.03 0.25
NPL -0.38 0.71
VNIIM -0.16 0.40
VSL -0.60 0.70
UME -0.53 0.67
BFKH 0.02 2.91
NIST -0.98 1.11
NPLI 1.88 5.05
BelGIM -0.54 1.35
KazStandart 0.02 4.05
NMC, A*STAR 0.04 1.1
SE "Ukrmetrteststandart" 2.19 1.44
VNIIM 0.033 0.253
Participating institutes
CCQM-K120
COOMET.QM-K120

The VNIIM prided the link between CCQM-K120 and COOMET.QM-K120.

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CCQM-K120
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Metrology area, Sub-field Chemistry and Biology, Gases
Description Ambient CO2
Time of measurements 2017
Status Approved for equivalence
Final Reports of the comparisons
Metrologia, 2019, 56, Tech. Suppl., 08001
Measurand Amount of carbon dioxide in air
Transfer device Dedicated samples
Comparison type Key Comparison
Consultative Committee CCQM (Consultative Committee for Amount of Substance)
Conducted by CCQM (Consultative Committee for Amount of Substance)
Comments

Results published on 6 December 2018

Carbon dioxide in air

Pilot institute BIPM
Bureau International des Poids et Mesures
BIPM - International Organization
Contact person E. Flores

+33 1 45 07 70 92
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
BIPM

Bureau International des Poids et Mesures, BIPM - International Organization, N/A

BFKH

Government Office of the Capital City Budapest, Hungary, EURAMET

GUM

Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET

INRIM

Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET

KRISS

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

LNE

Laboratoire national de métrologie et d'essais, France, EURAMET

NIM

National Institute of Metrology, China, APMP

NIST

National Institute of Standards and Technology, United States, SIM

NMIJ AIST

National Metrology Institute of Japan, Japan, APMP

NMISA

National Metrology Institute of South Africa, South Africa, AFRIMETS

NOAA/ESRL

NOAA Earth System Research Laboratory (NOAA/ESRL), WMO - International Organization, SIM

NPL

National Physical Laboratory, United Kingdom, EURAMET

NPLI

CSIR National Physical Laboratory of India, India, APMP

UME

TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET

VNIIM

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

VSL

VSL, Netherlands, EURAMET

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CCQM-K120

MEASURAND: Amount carbon dioxide in air
NOMINAL VALUE: 380 µmol/mol

There is no single reference value for this comparison. The Key Comparison Reference Values were obtained by applying a linear regression to a consistent set of results (excluding BFKH, NIST and NPLI). The value xiref is taken as the Key Comparison Reference Value for laboratory i.
The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms, both expressed in µmol/mol:
Di = (xi - xiref) and Ui, its expanded uncertainty, where
Ui=(2(uLab i2 + uiref2)1/2.
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CCQM-K120 and COOMET.QM-K120

 

MEASURAND   Carbon dioxide amount fraction in air

NOMINAL VALUE 480 µmol/mol

There is no single reference value for CCQM-K120. The Key Comparison Reference Values were obtained by applying a linear regression to a consistent set of results (excluding BFKH, NIM, NIST, NOAA and NPLI). The value xiref is taken as the Key Comparison Reference Value for laboratory i.

The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms, both expressed in µmol/mol:
Di = (xi - xiref) and Ui, its expanded uncertainty, where
Ui = (2(uLab i2 - uiref2)1/2.

The VNIIM provides the link between the key comparison CCQM-K120 and COOMET.QM-K120, having participated in both comparisons. The linking process is described in Section 3.4 of the COOMET.QM-K120.pdf.

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CCQM-K120 and COOMET.QM-K120

 

MEASURAND   Carbon dioxide amount fraction in air

NOMINAL VALUE 800 µmol/mol

There is no single reference value for CCQM-K120. The Key Comparison Reference Values were obtained by applying a linear regression to a consistent set of results (excluding BFKH, NIM, NIST, NOAA and NPLI). The value xiref is taken as the Key Comparison Reference Value for laboratory i.

The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms, both expressed in µmol/mol:
Di = (xi - xiref) and Ui, its expanded uncertainty, where
Ui = (2(uLab i2 - uiref2)1/2.

The VNIIM provides the link between the key comparison CCQM-K120 and COOMET.QM-K120, having participated in both comparisons. The linking process is described in Section 3.4 of the COOMET.QM-K120.pdf.

 

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CCQM-K120

MEASURAND: Amount carbon dioxide in air
NOMINAL VALUE: 380 µmol/mol

xi : result of measurement carried out by laboratory i
uLab i : standard uncertainty of xi
xiref : reference value for the cylinder determined by laboratory i
uiref : combined standard uncertainty of xiref 

* Re-submitted value following the decision of the the CCQM GAWG
** Uncertainties below the cutoff value of 0.095 µmol/mol

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CCQM-K120 and COOMET.QM-K120

 

MEASURAND   Carbon dioxide amount fraction in air

NOMINAL VALUE 480 µmol/mol

 

CCQM-K120

     
xi : result of measurement carried out by laboratory i
uLab i : standard uncertainty of xi
xiref : reference value for the cylinder determined by laboratory i
uiref : combined standard uncertainty of xiref 		    
     
     
             
  Labi Cylinder xi uLabi xiref uiref
  µmol/mol µmol/mol µmol/mol µmol/mol
  GUM D298393 478.1 2.6 477.706 0.051
  INRIM D247440 479.3 0.8 479.007 0.173
  KRISS D500647 480 0.1 479.851 0.052
  LNE 1029047 477.6 0.5 477.397 0.061
  NIM FB03744 489.15 0.11 489.202 0.099
  NMIJ CPC00494 471.301 0.026** 471.351 0.094
  NMISA M518167 479.5 0.8 479.042 0.068
  NOAA CC305198 479.26 0.13 479.363 0.058
  NPL 2170 480.02 0.12 479.985 0.049
  VNIIM M365664 480.18 0.065** 480.145 0.059
  VSL 5604880 480.48 0.18 480.523 0.045
  UME PSM266468 480.42 0.125* 480.537 0.078
  BFKH OMH44 479.9 1.05 464.911 0.138
  NIST FB04300 472.662 0.214 473.529 0.071
  NPLI JJ108862 480.52 1.52 480.863 0.079
* Re-submitted value following the decision of the the CCQM GAWG    
** Uncertainties below the cutoff value of 0.095 µmol/mol    

 

 

COOMET.QM-K120

 

MEASURAND   Carbon dioxide amount fraction in air

NOMINAL VALUE 480 µmol/mol

 

 

 

COOMET.QM-K120      
Labi xi ui  
µmol/mol µmol/mol  
BelGIM 482.4 0.3  
KazStandart 486.8 1.2  
NMC, A*STAR 479.87 0.34  
SE "Ukrmetrteststandart" 480.3 0.45  
VNIIM 480.18 0.065  

 

The measurement results are listed in Appendix I of the COOMET.QM-K120 Final Report.

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CCQM-K120 and COOMET.QM-K120

 

MEASURAND   Carbon dioxide amount fraction in air

NOMINAL VALUE 800 µmol/mol

 

xi : result of measurement carried out by laboratory i
uLab i : standard uncertainty of xi
xiref : reference value for the cylinder determined by laboratory i
uiref : combined standard uncertainty of xiref 

CCQM-K120

  Labi Cylinder xi uLabi xiref uiref
  µmol/mol µmol/mol µmol/mol µmol/mol
  GUM D298402 800.5 4.3 800.105 0.106
  INRIM D247445 798.9 1.3 798.389 0.128
  KRISS D500672 800.8 0.2 800.519 0.118
  LNE 1029048 802.2 0.85 802.099 0.078
  NMIJ CPC00558 803.658 0.039** 803.694 0.114
  NPL 2181 799.7 0.2 799.744 0.101
  NMISA M518244 799.1 0.5 798.187 0.132
  VNIIM M365707 800.73 0.095 800.697 0.084
  VSL 5604705 795.7 0.3 796.08 0.191
  UME PSM298347 800.76 0.180* 800.917 0.083
  NIM FB03748 809.82 0.13 810.424 0.327
  NOAA CB11668 794.08 0.24 794.608 0.237
  BFKH OHM69 800.3 1.45 800.282 0.1
  NIST FB04287 794.53 0.514 795.511 0.208
  NPLI JJ108854 796.38 2.515 794.501 0.239
* Re-submitted value following the decision of the the CCQM GAWG    
** Uncertainties below the cutoff value of 0.095 µmol/mol    

 

 

COOMET.QM-K120

 

       
  Labi xi u(xi)
  µmol/mol µmol/mol
  BelGIM 802.6 0.6
  KAZINMETR 799.4 2
  NMC, A*STAR 799.37 0.45
  Ukrmetrteststandart 800 0.65
  VNIIM 800.73 0.095