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CMCs Chemistry (5)
IONIZING RADIATION
Surface emission rate
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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 mmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in %
nitrogen or air carbon 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/GA19
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 or air carbon monoxide 0.01 to 0.35 100 to 2 0.01 to 0.35 100 to 2
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 28 June 2018.
Internal NMI service identifier: NPL/GA21

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 or air carbon monoxide 0.35 to 2 2 to 0.7 0.35 to 2 2 to 0.7
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 28 June 2018.
Internal NMI service identifier: NPL/GA22

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 or air carbon monoxide 2.0 to 10 0.7 to 0.14 2.0 to 10 0.7 to 0.14
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 28 June 2018.
Internal NMI service identifier: NPL/GA23

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 or air carbon monoxide 10.0 to 5.00E+05 0.14 to 0.141 10.0 to 5.00E+05 0.14
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 28 June 2018.
Internal NMI service identifier: NPL/GA24