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

 

 

CCQM-K120

MEASURAND: Amount carbon dioxide in air
NOMINAL VALUE: 480 µmol/mol

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

 

 

CCQM-K120

MEASURAND: Amount carbon dioxide in air
NOMINAL VALUE: 800 µmol/mol

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

 

 

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).

CCQM-K120

MEASURAND: Amount carbon dioxide in air
NOMINAL VALUE: 480 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).

CCQM-K120

MEASURAND: Amount carbon dioxide in air
NOMINAL VALUE: 800 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).

Comparison
Comparison close
CC comparison
Linked comparison
CCQM-K120
Metrology area, Sub-field Chemistry and Biology, Gases
Description Ambient CO2
Time of measurements 2017
Status Approved for equivalence
Final Reports of the comparisons
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
edgar.flores@bipm.org
+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, Turkey, EURAMET

VNIIM

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

VSL

VSL, Netherlands, EURAMET

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.

CCQM-K120

MEASURAND: Amount carbon dioxide in air
NOMINAL VALUE: 480 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.

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, 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.

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

CCQM-K120

MEASURAND: Amount carbon dioxide in air
NOMINAL VALUE: 480 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

CCQM-K120

MEASURAND: Amount carbon dioxide 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 

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