Viallon, J; Choteau, T; Moussay, P; Wielgosz, R I; van der Veen, A M H; Bi, Z; Crotwell, A; Hall, B; Mussell Webber, E; Hill-Pearce, R; Brewer, P; Worton, D; Mace, T; Sutour, C (2023) Final Report of CCQM-P225a and b, International Comparison on Carbon Dioxide in air and nitrogen at ambient levels (350 μmol/mol to 800 μmol/mol). Metrologia, 60 (1A). 08029

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Abstract

The pilot studies CCQM-P225a and b aimed at validating the performance of the pVT− CO2 manometric reference facility maintained at the BIPM as a reference for the planned on-going comparisons BIPM.QM-K2a and b for CO2 in air and nitrogen standards respectively over the range 350 μmol mol−1 to 800 μmol mol−1. The planned launch date of the BIPM.QM-K2a and b comparisons is 2024 and will enable NMIs and DIs to have access to on-demand comparisons for their CO2 in air and nitrogen standards over the range 350 μmol mol−1 to 800 μmol mol−1.

Item Type:	Article
Subjects:	Environmental Measurement > Atmospheric Science, Emission and Security
Divisions:	Atmospheric Environmental Sciences
Identification number/DOI:	10.1088/0026-1394/60/1A/08029
Last Modified:	24 Jun 2025 10:27
URI:	https://eprintspublications.npl.co.uk/id/eprint/10176