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CCQM-K82.2023

Final Reports of the comparisons	CCQM-K82.2023 Final report 2026 192pp
Measurand	Amount fraction of methane in air, with measurement results being expressed in mol/mol (or one of its multiples mmol/mol, μmol/mol or nmol/mol). Nominal range from 1800 nmol/mol to 2200 nmol/mol

Comparison type	Key Comparison
Consultative Committee	CCQM (Consultative Committee for Amount of Substance)
Conducted by	BIPM (Bureau International des Poids et Mesures)
Comments	The CCQM-K82.2023 comparison is designed to evaluate the level of compatibility of methane in air primary reference mixtures in the range (1800-2200) nmol/mol. The balance gas for the standards was either scrubbed dry real air or synthetic air. The comparison can also serve to demonstrate the purity analysis capabilities for NMIs/DIs for measurements of trace levels of methane in a variety of matrix gases.
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

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

NIMT	National Institute of Metrology (Thailand), Thailand, APMP

NIST	National Institute of Standards and Technology, United States, SIM

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

VSL	VSL, Netherlands, EURAMET

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