Results for: United Kingdom "NPL"
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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
United Kingdom, NPL (National Physical Laboratory)
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 in % Amount -of-substance fraction in nmol/mol Relative expanded uncertainty in %
nitrogen 1,2,3-trimethylbenzene 1 to 500 2.5 1 to 500 2.5
nitrogen 1,2,4-trimethylbenzene 1 to 500 2.5 1 to 500 2.5
nitrogen 1,3,5-trimethylbenzene 1 to 500 2.5 1 to 500 2.5
nitrogen 1,3-butadiene 1 to 500 2 1 to 500 2
nitrogen 1-butene 1 to 500 2 1 to 500 2
nitrogen 1-pentene 1 to 500 2 1 to 500 2
nitrogen 2,2,4-trimethylpentane 1 to 500 2 1 to 500 2
nitrogen 2-methyl-1,3-butadiene 1 to 500 2 1 to 500 2
nitrogen 2-methylbutane 1 to 500 2 1 to 500 2
nitrogen 2-methylpentane 1 to 500 2 1 to 500 2
nitrogen benzene 1 to 1.00E4 2 1 to 1.00E4 2
nitrogen cis-2-butene 1 to 500 2 1 to 500 2
nitrogen ethane 1 to 500 2 1 to 500 2
nitrogen ethene 1 to 500 2 1 to 500 2
nitrogen ethylbenzene 1 to 1.00E4 2 1 to 1.00E4 2
nitrogen ethyne 1 to 500 1.0E1 to 2 1 to 500 1.0E1 to 2
nitrogen i-butane 1 to 500 3 1 to 500 3
nitrogen m-xylene 1 to 1.00E4 2 1 to 1.00E4 2
nitrogen n-butane 1 to 500 2 1 to 500 2
nitrogen n-heptane 1 to 500 2 1 to 500 2
nitrogen n-hexane 1 to 500 2 1 to 500 2
nitrogen n-octane 1 to 500 2 1 to 500 2
nitrogen n-pentane 1 to 500 2 1 to 500 2
nitrogen o-xylene 1 to 1.00E4 2 1 to 1.00E4 2
nitrogen p-xylene 1 to 1.00E4 2 1 to 1.00E4 2
nitrogen propane 1 to 500 2 1 to 500 2
nitrogen propene 1 to 500 2 1 to 500 2
nitrogen toluene 1 to 1.00E4 2 1 to 1.00E4 2
nitrogen trans-2-butene 1 to 500 2 1 to 500 2
nitrogen trans-2-pentene 1 to 500 2 1 to 500 2
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 05 April 2022
  • Institute service identifier : GA43
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 in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
refinery gas 1,3-butadiene 5 to 30 1.2 5 to 30 1.2
refinery gas 1-butene 1 to 10 0.45 1 to 10 0.45
refinery gas ethane 10 to 100 0.2 10 to 100 0.2
refinery gas ethene 50 to 200 0.2 50 to 200 0.2
refinery gas helium 10 to 700 0.2 10 to 700 0.2
refinery gas hydrogen 50 to 200 0.25 50 to 200 0.25
refinery gas isobutylene 1 to 10 0.45 1 to 10 0.45
refinery gas methane 50 to 200 0.15 50 to 200 0.15
refinery gas nitrogen 10 to 700 0.22 10 to 700 0.22
refinery gas propane 1 to 50 0.2 1 to 50 0.2
refinery gas propene 5 to 100 0.2 5 to 100 0.2
  • Mechanism for measurement service delivery : PRGM and calibration
  • Approved on 21 October 2001
  • Institute service identifier : 66
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 in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
liquefied petroleum gas (LPG); liquefied natural gas (LNG) 1,3-butadiene 4 to 20 4.5 4 to 20 4.5
liquefied petroleum gas (LPG); liquefied natural gas (LNG) 1-butene 5 to 100 0.8 5 to 100 0.8
liquefied petroleum gas (LPG); liquefied natural gas (LNG) ethane 5 to 50 2 1 to 50 2
liquefied petroleum gas (LPG); liquefied natural gas (LNG) i-butane 5 to 750 0.7 1 to 750 0.7
liquefied petroleum gas (LPG); liquefied natural gas (LNG) i-pentane 4 to 20 1.2 4 to 20 1.2
liquefied petroleum gas (LPG); liquefied natural gas (LNG) isobutylene 5 to 100 0.5 5 to 100 0.5
liquefied petroleum gas (LPG); liquefied natural gas (LNG) n-butane 5 to 100 0.7 5 to 100 0.7
liquefied petroleum gas (LPG); liquefied natural gas (LNG) n-pentane 3 to 20 2.8 3 to 20 2.8
liquefied petroleum gas (LPG); liquefied natural gas (LNG) propane 5 to 750 0.6 1 to 750 0.6
liquefied petroleum gas (LPG); liquefied natural gas (LNG) propene 5 to 50 0.7 1 to 50 0.7
  • Mechanism for measurement service delivery : PRGM and calibration
  • Approved on 28 June 2018
  • Institute service identifier : GA25
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 in % Amount-of-substance fraction in nmol/mol Relative expanded uncertainty in %
nitrogen 1,8-cineole 2.5 to 1000 5 2.5 to 1000 5
nitrogen 3-carene 2.5 to 1000 2 2.5 to 1000 2
nitrogen alpha-pinene 2.5 to 1000 3 2.5 to 1000 3
nitrogen R-limonene 2.5 to 1000 2 2.5 to 1000 2
  • Mechanism for measurement service delivery : PRGM and calibration
  • Approved on 15 October 2019
  • Institute service identifier : GA06
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 in % Amount-of-substance fraction in µmol/mol Relative expanded uncertainty in %
nitrogen or methane 1-propanethiol 10 to 1000 1 10 to 1000 1
nitrogen or methane 2-methyl-2-propanethiol 10 to 1000 1 10 to 1000 1
nitrogen or methane 2-propanethiol 10 to 1000 1 10 to 1000 1
nitrogen or methane butanethiol 10 to 1000 1 10 to 1000 1
nitrogen or methane carbon disulfide 10 to 1000 1 10 to 1000 1
nitrogen or methane carbonyl sulfide 10 to 1000 1 10 to 1000 1
nitrogen or methane diethyl sulfide 10 to 1000 1 10 to 1000 1
nitrogen or methane dimethyl sulfide 10 to 1000 1 10 to 1000 1
nitrogen or methane ethanethiol 10 to 1000 1 10 to 1000 1
nitrogen or methane ethyl methyl sulfide 10 to 1000 1 10 to 1000 1
nitrogen or methane hydrogen sulfide 10 to 500 1 10 to 500 1
nitrogen or methane methanethiol 10 to 1000 1 10 to 1000 1
nitrogen or methane tetrahydrothiophene 10 to 1000 1 10 to 1000 1
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 16 June 2021
  • Institute service identifier : GA35
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 in % Amount-of-substance fraction in µmol/mol Relative expanded uncertainty in %
nitrogen or methane 1-propanethiol 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane 2-methyl-2-propanethiol 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane 2-propanethiol 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane butanethiol 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane carbon disulfide 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane carbonyl sulfide 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane diethyl sulfide 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane dimethyl sulfide 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane ethanethiol 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane ethyl methyl sulfide 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane hydrogen sulfide 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane methanethiol 1 to 10 2.5 to 1 1 to 10 2.5 to 1
nitrogen or methane tetrahydrothiophene 1 to 10 2.5 to 1 1 to 10 2.5 to 1
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 11 April 2021
  • Institute service identifier : GA34
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 in % Amount-of-substance fraction in µmol/mol Relative expanded uncertainty in %
air 2-butanone 100 to 1000 2 100 to 1000 2
air acetone 10 to 500 2 10 to 500 2
air ethanol 100 to 200 1.5 100 to 200 1.5
air methanol 10 to 100 3 to 2 10 to 100 3 to 2
air toluene 10 to 100 2 10 to 100 2
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 11 April 2021
  • Institute service identifier : GA36
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Number concentration in cm-3 Absolute expanded uncertainty in % Number concentration in Absolute expanded uncertainty in
air airborne particles 100 to 2.00E4 5
  • Mechanism for measurement service delivery : Calibration
  • Approved on 08 July 2015
  • Institute service identifier : P01
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Charge concentration in fC/cm3 Absolute expanded uncertainty in % Charge concentration in Absolute expanded uncertainty in
air airborne particles 1 to 3 2
  • Mechanism for measurement service delivery : Calibration
  • Approved on 08 July 2015
  • Institute service identifier : P02
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 in % Amount -of-substance fraction in µmol/mol Relative expanded uncertainty in %
nitrogen or air ammonia 10 to 100 2.9 10 to 100 2.9
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 04 April 2022
  • Institute service identifier : GA41
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
hydrogen argon 0.01 to 500 2.5E1 to 1.5
hydrogen carbon dioxide 0.01 to 500 2.5E1 to 1.5
hydrogen carbon monoxide 0.01 to 500 2.5E1 to 1.5
hydrogen helium 20 to 500 5 to 2
hydrogen nitrogen 0.01 to 500 2.5E1 to 1.5
hydrogen oxygen 0.01 to 500 2.5E1 to 1.5
hydrogen total hydrocarbon compounds 0.01 to 100 3.0E1 to 1.5
hydrogen total sulfur compounds 0 to 10 3.0E1 to 2
hydrogen water 0.05 to 20 1.5E1
hydrogen water 20 to 100 2.5E1
  • Mechanism for measurement service delivery : Calibration
  • Approved on 21 October 2001
  • Institute service identifier : 67 rev
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 in % Amount-of-substance fraction in nmol/mol Relative expanded uncertainty in %
nitrogen beta-pinene 2.5 to 1000 3 2.5 to 1000 3
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 15 June 2021
  • Institute service identifier : GA06
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 in % Amount-of-substance fraction in µmol/mol Relative expanded uncertainty in %
nitrogen or air carbon dioxide 5.00E-3 to 10 1.0E2 to 5.0E-2 5.00E-3 to 10 1.0E2 to 5.0E-2
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 22 October 2020
  • Institute service identifier : NPL/GA01
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 in % Amount -of-substance fraction in µmol/mol Relative expanded uncertainty in %
nitrogen carbon dioxide 10 to 5.00E5 0.13 10 to 5.00E5 0.13
nitrogen carbon monoxide 10 to 5.00E5 0.13 10 to 5.00E5 0.13
nitrogen nitrogen monoxide 10 to 1000 1 10 to 1000 1
nitrogen propane 1 to 5.00E5 1.3 to 0.13 1 to 5.00E5 1.3 to 0.13
nitrogen sulphur dioxide 10 to 1000 0.5 10 to 1000 0.5
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 05 April 2022
  • Institute service identifier : GA44
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 in % Amount-of-substance fraction in µmol/mol Relative expanded uncertainty in %
nitrogen or air carbon dioxide 10 to 5.00E5 5.0E-2 10 to 5.00E5 5.0E-2
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 22 October 2020
  • Institute service identifier : NPL/GA02
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 in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
synthetic natural gas carbon dioxide 0.5 to 100 0.2 to 0.1 0.5 to 100 0.2 to 0.1
synthetic natural gas ethane 1 to 200 0.3 to 0.2 1 to 200 0.3 to 0.2
synthetic natural gas helium 0.05 to 10 1 to 0.5 0.05 to 10 1 to 0.5
synthetic natural gas i-butane 0.1 to 15 0.35 to 0.15 0.1 to 15 0.35 to 0.15
synthetic natural gas i-pentane 0.2 to 20 1 to 0.4 0.2 to 20 1 to 0.4
synthetic natural gas methane 600 to 980 4.0E-2 600 to 980 4.0E-2
synthetic natural gas n-butane 0.1 to 15 0.35 to 0.15 0.1 to 15 0.35 to 0.15
synthetic natural gas n-hexane 0.1 to 20 1 to 0.4 0.1 to 20 1 to 0.4
synthetic natural gas n-pentane 0.2 to 20 1 to 0.4 0.2 to 20 1 to 0.4
synthetic natural gas neo-pentane 0.2 to 20 2 to 1.5 0.2 to 20 2 to 1.5
synthetic natural gas nitrogen 0.2 to 200 0.15 to 0.1 0.2 to 200 0.15 to 0.1
synthetic natural gas propane 0.5 to 100 0.15 to 0.12 0.5 to 100 0.15 to 0.12
  • Mechanism for measurement service delivery : PRGM and calibration
  • Approved on 21 October 2001
  • Institute service identifier : 61rev2
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 in % Amount-of-substance fraction in µmol/mol Relative expanded uncertainty in %
nitrogen or air carbon dioxide 10 to 5.00E5 0.13 10 to 5.00E5 0.13
nitrogen or air carbon monoxide 10 to 1.00E5 0.13 10 to 1.00E5 0.13
nitrogen or air propane 10 to 1.00E4 0.13 10 to 1.00E4 0.13
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 22 October 2020
  • Institute service identifier : NPL/GA19
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in cmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in cmol/mol Relative expanded uncertainty in %
biogas carbon dioxide 4 to 45 0.1 4 to 45 0.1
biogas ethane 20 to 5000 0.42 20 to 5000 0.42
biogas hydrogen 2 to 30 0.4 2 to 30 0.4
biogas methane 35 to 95 0.1 35 to 95 0.1
biogas nitrogen 4 to 25 0.3 4 to 25 0.3
biogas oxygen 2 to 15 0.3 2 to 15 0.3
biogas propane 20 to 5000 0.4 20 to 5000 0.4
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 11 April 2021
  • Institute service identifier : GA37
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 in % Amount-of-substance fraction in µmol/mol Relative expanded uncertainty in %
nitrogen or air carbon monoxide 1 to 10 1.3 to 0.13 1 to 10 1.3 to 0.13
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 11 April 2021
  • Institute service identifier : GA23
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 in % Amount-of-substance fraction in µmol/mol Relative expanded uncertainty in %
nitrogen or air carbon monoxide 0.35 to 1 2 0.35 to 1 2
  • Mechanism for measurement service delivery : PRM and calibration
  • Approved on 16 June 2021
  • Institute service identifier : GA22

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