| Metrology area, Sub-field | Chemistry and Biology, Gases |
| Description | Carbon dioxide in dry air |
| Time of measurements | 2024 - |
| Status | Measurements in progress |
| References |
BIPM.QM-K2 Technical protocol and instructions for participation |
| Measurand | Amount fraction of carbon dioxide in dry air from 350 μmolmol-1 to 800 μmol mol-1 |
| Transfer device | High pressure cylinders |
| Comparison type | Key Comparison |
| Consultative Committee | CCQM (Consultative Committee for Amount of Substance) |
| Conducted by | BIPM (Bureau International des Poids et Mesures) |
| Comments | BIPM.QM-K2 is an on-demand key comparison for gaseous standards of CO2 in dry air (part a) or in nitrogen (part b) contained in high pressure cylinders. The key comparisons BIPM.QM-K2.a and b are aimed at underpinning the capabilities of the participants to value assign the amount fraction of CO2 in air (part a) or in nitrogen (part b) in gas standards over the amount fraction range from 350 μmol mol−1 to 800 μmol mol−1, with a method ensuring traceability of the measurements to the SI. The comparison is run as a series of bilateral comparisons between each participant and the BIPM. The facility maintained by the BIPM (the so called the CO2-PVT facility) provides the key comparison reference value in each case and quantifies CO2 amount fractions in air or nitrogen samples via measurements of the pressure and temperature of the sample and of the CO2 extracted from it by cryogenic trapping. |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | J. Viallon +33 (0) 1 47 07 62 70 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
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" :
