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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 mmol/mol Relative expanded uncertainty
(k = 2, 95 %) in %
Amount-of-substance fraction in mmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in %
synthetic natural gas i-pentane 0.2 to 20 1 to 0.4 0.2 to 20 1 to 0.4
Mechanism(s) for measurement service delivery: PRGM and calibration
Internal NMI service identifier: NPL/61rev2
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 mmol/mol Relative expanded uncertainty
(k = 2, 95 %) in %
Amount-of-substance fraction in mmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in %
synthetic natural gas n-pentane 0.2 to 20 1 to 0.4 0.2 to 20 1 to 0.4
Mechanism(s) for measurement service delivery: PRGM and calibration
Internal NMI service identifier: NPL/61rev2
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 mmol/mol Relative expanded uncertainty
(k = 2, 95 %) in %
Amount-of-substance fraction in mmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in %
synthetic natural gas n-hexane 0.1 to 20 1 to 0.4 0.1 to 20 1 to 0.4
Mechanism(s) for measurement service delivery: PRGM and calibration
Internal NMI service identifier: NPL/61rev2
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 mmol/mol Relative expanded uncertainty
(k = 2, 95 %) in %
Amount-of-substance fraction in mmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in %
synthetic natural gas helium 0.05 to 10 1 to 0.5 0.05 to 10 1 to 0.5
Mechanism(s) for measurement service delivery: PRGM and calibration
Internal NMI service identifier: NPL/61rev2
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
Number concentration in cm-3 Relative expanded uncertainty
(k = 2, 95 %) in %
air airborne particles 100 to 20000 5
Mechanism(s) for measurement service delivery: Calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/P01

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
Charge concentration in fC/cm3 Relative expanded uncertainty
(k = 2, 95 %) in %
air airborne particles 1 to 3 2
Mechanism(s) for measurement service delivery: Calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/P02

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 %
methane methylacrylate 1 to 100 6 to 1 1 to 100 6 to 1
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/89

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 %
methane ethyl acrylate 1 to 100 6 to 1 1 to 100 6 to 1
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/90

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
Amount-of-substance fraction in nmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in nmol/mol
nitrogen methane 3.6 to 1000 3.6
Mechanism(s) for measurement service delivery: Calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/91

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
Amount-of-substance fraction in µmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in nmol/mol
nitrogen methane 1 to 1.7 3.6
Mechanism(s) for measurement service delivery: Calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/92

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 methane 1.7 to 2.5 0.21 to 0.2 1.7 to 2.5 0.21 to 0.2
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/93

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 methane 2.5 to 1000 0.2 2.5 to 1000 0.2
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/94

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 mmol/mol Relative expanded uncertainty
(k = 2, 95 %) in %
Amount-of-substance fraction in mmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in %
nitrogen methane 1 to 25 0.2 1 to 25 0.2
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/95

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
Amount-of-substance fraction in nmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in nmol/mol
synthetic air methane 3.6 to 1000 3.6
Mechanism(s) for measurement service delivery: Calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/96

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
Amount-of-substance fraction in µmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in nmol/mol
synthetic air methane 1 to 1.7 3.6
Mechanism(s) for measurement service delivery: Calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/97

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 methane 1.7 to 2.5 0.21 to 0.2 1.7 to 2.5 0.21 to 0.2
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/98

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 methane 2.5 to 1000 0.2 2.5 to 1000 0.2
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/99

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 mmol/mol Relative expanded uncertainty
(k = 2, 95 %) in %
Amount-of-substance fraction in mmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in %
synthetic air methane 1 to 25 0.2 1 to 25 0.2
Mechanism(s) for measurement service delivery: PRGM and calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/100

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
Amount-of-substance fraction in nmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in nmol/mol
synthetic air methane 3.6 to 1000 3.6
Mechanism(s) for measurement service delivery: Calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/101

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
Amount-of-substance fraction in µmol/mol Absolute expanded uncertainty
(k = 2, 95 %) in nmol/mol
synthetic air methane 1 to 1.7 3.6
Mechanism(s) for measurement service delivery: Calibration
Approved on 08 July 2015.
Internal NMI service identifier: NPL/102