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).
| 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 +33 1 45 07 70 92 |
| 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 |
This page proposes print-out 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" :
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
