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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 nmol/mol Relative expanded uncertainty
(k = 2, 95 %) in %
Amount-of-substance fraction in nmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in %
synthetic air sulfur dioxide 100 to 1000 2.0 to 1.5 100 to 1000 2.0 to 1.5
Mechanism(s) for measurement service delivery: SGS and calibration
Approved on 28 June 2016.
Internal NMI service identifier: NPL/30 rev