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United Kingdom, NPL (National Physical Laboratory)
Complete CMCs in Chemistry for Gases for United Kingdom (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in µmol/mol Relative expanded uncertainty
(k = 2, 95 %) in %
Amount-of-substance fraction in µmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in %
synthetic air propane 1 to 10 1 to 0.2 1 to 10 1 to 0.2
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/107