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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)
Spain, CEM (Centro Español de Metrologia)
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 0.28 10 to 5.00E5 0.28
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-4A(a)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-4A(a)
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 %
synthetic biogas carbon dioxide 4 to 45 0.43 4 to 45 0.43
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-7B
  • Approved on 23 April 2021
  • Institute service identifier : 6.6-7B
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 %
nitrogen carbon dioxide 10 to 200 1 10 to 200 1.2
nitrogen carbon monoxide 5 to 100 0.6 5 to 100 0.9
nitrogen propane 0.6 to 4 0.9 0.6 to 4 1.2
  • Mechanism for measurement service delivery : CRM supply and analyser calibration
  • Approved on 21 October 2001
  • Institute service identifier : 6.6-4A(b)
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 0.2 10 to 5.00E5 0.2
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-02(a)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-02(a)
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 %
synthetic air carbon dioxide 10 to 5.00E5 0.2 10 to 5.00E5 0.2
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-02(c)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-02(c)
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
synthetic natural gas carbon dioxide 8 to 32 1.6 to 0.5
synthetic natural gas ethane 28 to 95 0.6 to 0.4
synthetic natural gas i-butane 1.5 to 12 1.4 to 0.5
synthetic natural gas methane 740 to 920 0.3 to 0.5
synthetic natural gas n-butane 1.5 to 12 1.4 to 0.4
synthetic natural gas nitrogen 35 to 75 1.3 to 0.5
synthetic natural gas propane 8 to 35 1 to 0.3
  • Mechanism for measurement service delivery : Calibration, 6.6-7G(2)
  • Approved on 21 October 2001
  • Institute service identifier : 6.6-7G(2)
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 1 to 10 2 to 0.2 1 to 10 2 to 0.2
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-02(b)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-02(b)
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 %
synthetic air carbon dioxide 1 to 10 2 to 0.2 1 to 10 2 to 0.2
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-02(d)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-02(d)
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 monoxide 10 to 1.20E5 0.28 10 to 1.20E5 0.28
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-4A(a)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-4A(a)
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 %
synthetic air carbon monoxide 1 to 10 2.8 to 0.28 1 to 10 2.8 to 0.28
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-01(d)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-01(d)
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 monoxide 1 to 10 2.8 to 0.28 1 to 10 2.8 to 0.28
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-01(b)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-01(b)
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 monoxide 10 to 5.00E5 0.28 10 to 5.00E5 0.28
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-01(a)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-01(a)
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 %
synthetic air carbon monoxide 10 to 1.20E5 0.28 10 to 1.20E5 0.28
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-01(c)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-01(c)
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 %
synthetic biogas ethane 2.00E-3 to 0.5 0.19 2.00E-3 to 0.5 0.19
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-7B
  • Approved on 23 April 2021
  • Institute service identifier : 6.6-7B
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
nitrogen ethanol 100 to 800 3 to 0.8
  • Mechanism for measurement service delivery : Calibration, 6.6-08(a)
  • Approved on 08 July 2015
  • Institute service identifier : 6.6-08(a)
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 %
synthetic biogas hydrogen 0.2 to 3 3.0E1 0.2 to 3 3.0E1
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-7B
  • Approved on 23 April 2021
  • Institute service identifier : 6.6-7B
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 methane 10 to 5.00E5 0.28 10 to 5.00E5 0.28
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-06(c)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-06(c)
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 methane 1 to 10 2.8 to 0.28 1 to 10 2.8 to 0.28
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-06(a)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-06(a)
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 %
synthetic biogas methane 35 to 95 0.22 35 to 95 0.22
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-7B
  • Approved on 23 April 2021
  • Institute service identifier : 6.6-7B
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 %
synthetic air methane 1 to 10 2.8 to 0.28 1 to 10 2.8 to 0.28
  • Mechanism for measurement service delivery : Calibration, CRM, 6.6-06(d)
  • Approved on 22 October 2020
  • Institute service identifier : 6.6-06(d)

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