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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)
Russian Federation, VNIIFTRI (Institute of Physical Technical and Radiotechnical Measurements, Rosstandart)
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
water 3.8 to 4.2 4.6E-3 3.8 to 4.2 6.0E-3 to 1.0E-2
  • Mechanism for measurement service delivery : CRM: primary buffer solution (potassium hydrophtalate), measurement of solution
  • Temperature range 15 °C to 37 °C. Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention. The values are given for a temperature of 25°C.
  • Approved on 30 June 2017
  • Institute service identifier : 630-3
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous buffer solution 6.84 to 6.98 4.0E-3 6.861 to 6.869 4.0E-3
  • Mechanism for measurement service delivery : CRM 630-04a/b: disodium hydrogen phosphate + potassium dihydrogen phosphate. Calibration
  • Temperature range 0 °C to 60 °C. Data given for 25 °C. Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention
  • Approved on 06 December 2011
  • Institute service identifier : 630-4
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous buffer solution 9.5 to 10.5 3.9E-3
  • Mechanism for measurement service delivery : Calibration
  • The all values are given for a temperature of 25°C.
    Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention.
  • Approved on 03 May 2021
  • Institute service identifier : 630-06
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in S/m Relative expanded uncertainty in % Electrolytic conductivity in S/m Relative expanded uncertainty in %
aqueous solution (KCl or NaCl) 0.15 to 1.5 5.0E-2
  • Mechanism for measurement service delivery : Calibration
  • Temperature range is from 15 °C to 30 °C. The data is given for 25 °C.
  • Approved on 03 May 2021
  • Institute service identifier : 610-19
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous buffer solution 3.55 to 3.56 4.0E-3 3.553 to 3.561 4.0E-3
  • Mechanism for measurement service delivery : CRM 630-02: potassium hydrogen tartrate. Calibration
  • Temperature range 0 °C to 60 °C. Data given for 25 °C. Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention
  • Approved on 06 December 2011
  • Institute service identifier : 630-2
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous buffer solution 4 to 4.08 4.0E-3 4.001 to 4.009 4.0E-3
  • Mechanism for measurement service delivery : CRM 630-03: potassium hydrogen phthalate. Calibration
  • Temperature range 0 °C to 60 °C. Data given for 25 °C. Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention
  • Approved on 06 December 2011
  • Institute service identifier : 630-3
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous buffer solution 8.95 to 9.47 8.0E-3 9.176 to 9.184 8.0E-3
  • Mechanism for measurement service delivery : CRM 630-05: disodium tetraborate. Calibration
  • Temperature range 0 °C to 60 °C. Data given for 25 °C. Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention
  • Approved on 06 December 2011
  • Institute service identifier : 630-5
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in S/m Relative expanded uncertainty in % Electrolytic conductivity in S/m Relative expanded uncertainty in %
aqueous solutions, multi-component aqueous salt solutions (sea water) 1.00E-3 to 9.999 0.3 to 5.0E-2 1.00E-3 to 9.999 0.3 to 5.0E-2
  • Mechanism for measurement service delivery : Calibration, CRM (aqueous solution of KCl)
  • Temperature range is from 0 °C to 90 °C. Data is given for 25 °C
  • Approved on 06 December 2011
  • Institute service identifier : 610-18
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH in Absolute expanded uncertainty in pH in Absolute expanded uncertainty in
aqueous buffer solution 6.8 to 7.5 6.0E-3 to 8.0E-3 6.86 to 7.41 1.0E-2
  • Mechanism for measurement service delivery : CRM 630-04a/b: disodium hydrogen phosphate + potassium dihydrogen phosphate. Calibration
  • Temperature range 15 °C to 37 °C. Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention. The values are given for a temperature of 25 °C
  • Approved on 30 June 2016
  • Institute service identifier : b
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/kg Absolute expanded uncertainty in mg/kg Mass fraction in
leather materials arsenic 10 to 100 1 to 7
  • Mechanism for measurement service delivery : Reference measurement of the sample supplied by the customer
  • Approved on 23 October 2019
  • Institute service identifier : 680-5
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/kg Absolute expanded uncertainty in mg/kg Mass fraction in
leather materials cadmium 10 to 100 0.35 to 2.5
  • Mechanism for measurement service delivery : Reference measurement of the sample supplied by the customer
  • Approved on 23 October 2019
  • Institute service identifier : 680-6
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/kg Absolute expanded uncertainty in mg/kg Mass fraction in
leather materials cobalt 10 to 100 0.3 to 2
  • Mechanism for measurement service delivery : Reference measurement of the sample supplied by the customer
  • Approved on 23 October 2019
  • Institute service identifier : 680-8
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in µg/kg Absolute expanded uncertainty in µg/kg Mass fraction in Absolute expanded uncertainty in
fresh water copper 1 to 100 0.11 to 8
  • Mechanism for measurement service delivery : Reference measurement of the sample supplied by the customer
  • Approved on 28 June 2018
  • Institute service identifier : 680-1
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in µg/kg Absolute expanded uncertainty in µg/kg Mass fraction in Absolute expanded uncertainty in
fresh water lead 0.1 to 100 1.5E-2 to 1.0E1
  • Mechanism for measurement service delivery : Reference measurement of the sample supplied by the customer
  • Approved on 28 June 2018
  • Institute service identifier : 680-3
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/kg Absolute expanded uncertainty in mg/kg Mass fraction in
leather materials lead 10 to 100 0.4 to 3
  • Mechanism for measurement service delivery : Reference measurement of the sample supplied by the customer
  • Approved on 23 October 2019
  • Institute service identifier : 680-7
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/kg Absolute expanded uncertainty in mg/kg Mass fraction in Absolute expanded uncertainty in
fresh water sodium 0.5 to 50 3.5E-2 to 2.5
  • Mechanism for measurement service delivery : Reference measurement of the sample supplied by the customer
  • Approved on 28 June 2018
  • Institute service identifier : 680-4
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in µg/kg Absolute expanded uncertainty in µg/kg Mass fraction in Absolute expanded uncertainty in
fresh water strontium 1 to 100 5.0E-2 to 3.5
  • Mechanism for measurement service delivery : Reference measurement of the sample supplied by the customer
  • Approved on 28 June 2018
  • Institute service identifier : 680-2
Measurement microphones , Pressure sensitivity level
Measurement microphone type LS2P
Absolute expanded uncertainty : 7.0E-2 dB
IEC 61094-2:1992
Frequency : 80 Hz to 100 Hz
Approved on 21 October 2001
Measurement microphones , Pressure sensitivity level
Measurement microphone type LS2P
Absolute expanded uncertainty : 0.14 dB
IEC 61094-2:1992
Frequency : 31.5 Hz
Approved on 17 September 2009
Measurement microphones , Pressure sensitivity level
Measurement microphone type LS1P
Absolute expanded uncertainty : 6.0E-2 dB
IEC 61094-2:1992
Frequency : 5 kHz
Approved on 21 October 2001

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