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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 %
nitrogen nitrogen monoxide 10 to 1000 1 10 to 1000 3
Mechanism(s) for measurement service delivery: PRGM and calibration
Internal NMI service identifier: NPL/58 rev
This displays only one part of a multi-component CMC.

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 %
nitrogen nitrogen monoxide 0.1 to 0.444 4.4 to 1 0.1 to 0.444 4.4 to 1.0
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 30 June 2017.
Internal NMI service identifier: NPL/GA07

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 %
nitrogen nitrogen monoxide 0.4441 to 1.4 1.0 to 1 0.444 to 1.4 1.0
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 30 June 2017.
Internal NMI service identifier: NPL/GA08

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 %
nitrogen nitrogen monoxide 1.4 to 10 1.0 to 0.14 1.4 to 10.0 1.0 to 0.14
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 30 June 2017.
Internal NMI service identifier: NPL/GA09

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 %
nitrogen nitrogen monoxide 10 to 5.00E+05 0.14 10.0 to 5.00E+05 0.14
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 30 June 2017.
Internal NMI service identifier: NPL/GA10