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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)
Germany, UBA (Umweltbundesamt, Federal Environment Agency)
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
nitrogen benzene 3 to 100 5 to 2
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 01 March 2005
  • Institute service identifier : Org-1 R
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
synthetic air benzene 3 to 100 5 to 2
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 21 October 2001
  • Institute service identifier : Org-1
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
synthetic air carbon monoxide 5 to 50 1.6
  • Mechanism for measurement service delivery : Calibration of gas mixtures
  • Approved on 22 October 2020
  • Institute service identifier : UBA/Inorg-3
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
synthetic air ethylbenzene 3 to 100 8 to 5
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 21 October 2001
  • Institute service identifier : Org-3
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
nitrogen ethylbenzene 3 to 100 8 to 5
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 21 October 2001
  • Institute service identifier : Org-3
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 % Absolute expanded uncertainty in %
nitrogen and synthetic air m-/p-xylene 1 to 100 1.4E1 to 5
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 04 April 2022
  • Institute service identifier : Org-7 R
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
synthetic air m-xylene 3 to 100 6 to 3
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 21 October 2001
  • Institute service identifier : Org-4
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
nitrogen nitrogen monoxide 100 to 1000 2 to 1
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 27 March 2013
  • Institute service identifier : Inorg-2
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
nitrogen o-xylene 3 to 100 6 to 3
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 01 March 2005
  • Institute service identifier : Org-5 R
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
synthetic air o-xylene 3 to 100 6 to 3
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 21 October 2001
  • Institute service identifier : Org-5
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 Absolute expanded uncertainty in nmol/mol Amount-of-substance fraction in Absolute expanded uncertainty in
synthetic air ozone 0 to 1000
  • Uncertainty equation CMC : Q[1.1, 0.022 x(O3)]

    The uncertainty is expressed in nmol/mol

  • Mechanism for measurement service delivery : Calibration
  • The notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a2 + b2]1/2
  • Approved on 08 July 2015
  • Institute service identifier : Inorg-4
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
synthetic air p-xylene 3 to 100 6 to 3
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 21 October 2001
  • Institute service identifier : Org-6
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
synthetic air sulphur dioxide 100 to 280 5.6 to 2
  • Mechanism for measurement service delivery : Calibration of gas mixtures
  • Approved on 22 October 2020
  • Institute service identifier : UBA/Inorg-1a
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
synthetic air sulphur dioxide 280 to 1000 2
  • Mechanism for measurement service delivery : Calibration of gas mixtures
  • Approved on 22 October 2020
  • Institute service identifier : UBA/Inorg-1b
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
nitrogen toluene 3 to 100 5 to 2.5
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 01 March 2005
  • Institute service identifier : Org-2 R
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 Absolute expanded uncertainty in % Amount-of-substance fraction in Absolute expanded uncertainty in
synthetic air toluene 3 to 100 5 to 2.5
  • Mechanism for measurement service delivery : Gas analysis, calibration
  • Approved on 21 October 2001
  • Institute service identifier : Org-2

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