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CMCs Chemistry (4)
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nitrogen (4)
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propane (4)
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United Kingdom (4)
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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 %
nitrogen propane 2 to 50 3 10 to 100 4
Mechanism(s) for measurement service delivery: PRGM, SGS and calibration
Internal NMI service identifier: NPL/53
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 nmol/mol Relative expanded uncertainty
(k = 2, 95 %) in %
Amount-of-substance fraction in nmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in %
nitrogen propane 2 to 10 3 2 to 10 3
Mechanism(s) for measurement service delivery: PRGM, SGS and calibration
Internal NMI service identifier: NPL/54
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 nmol/mol Relative expanded uncertainty
(k = 2, 95 %) in %
Amount-of-substance fraction in nmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in %
nitrogen propane 1 to 50 1.5 1 to 50 1.5 to 1
Mechanism(s) for measurement service delivery: PRGM and calibration
Internal NMI service identifier: NPL/63
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 propane 1 to 100 0.3 1 to 100 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.