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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)
China, NIM (National Institute of Metrology)
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 10 to 20 8.0E-2 10 to 20 0.1
  • Mechanism for measurement service delivery : NIM CRMs GBW13120 and GBW13124, Calibration, Provision of reference values for PT schemes.
  • The temperature range is from 15 °C to 35 °C
  • Approved on 20 January 2016
  • Institute service identifier : EC-3
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 %
aueous solution 0.01 to 10 0.2 to 8.0E-2 0.01 to 10 0.5 to 0.1
  • Mechanism for measurement service delivery : CRMs, calibration, provision of reference values for PT schemes
  • The temperature range is from 5 °C to 50 °C
  • Approved on 06 December 2011
  • Institute service identifier : EC-1
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in mS/m Relative expanded uncertainty in % Electrolytic conductivity in mS/m Relative expanded uncertainty in %
aueous solution 2 to 10 0.2 2 to 10 1 to 0.5
  • Mechanism for measurement service delivery : CRMs, calibration, provision of reference values for PT schemes
  • The temperature range is from 5 °C to 50 °C
  • Approved on 06 December 2011
  • Institute service identifier : EC-2
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance content or amount content in mmol/kg Absolute expanded uncertainty in % Amount-of-substance content or amount content in mmol/kg Absolute expanded uncertainty in mmol/kg
aqueous solution (methyl)seleno-cysteine 1.00E-3 to 1 1.0E1 to 2.7 0.442 1.2E-2
  • Mechanism for measurement service delivery : CRM GBW 10088
  • Approved on 20 January 2016
  • Institute service identifier : IS-94
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 %
methane 1,2-butadiene 1 to 10 1.5 1 to 10 1.5
  • Mechanism for measurement service delivery : NIM CRM
  • Approved on 03 November 2014
  • Institute service identifier : GAS 51
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 refinery gas 1,3-butadiene 5 to 30 1 to 0.5 5 to 30 1 to 0.5
synthetic refinery gas 1-butene 1 to 10 2.9 to 0.6 1 to 10 2.9 to 0.6
synthetic refinery gas ethane 10 to 100 1 to 0.5 10 to 100 1 to 0.5
synthetic refinery gas ethene 50 to 200 2.6 to 1.8 50 to 200 2.6 to 1.8
synthetic refinery gas hydrogen 50 to 700 0.7 to 0.4 50 to 700 0.7 to 0.4
synthetic refinery gas isobutene 1 to 10 6 to 2.2 1 to 10 6 to 2.2
synthetic refinery gas methane 50 to 700 0.9 to 0.4 50 to 700 0.9 to 0.4
synthetic refinery gas n-butane 1 to 20 2.9 to 1 1 to 20 2.9 to 1
synthetic refinery gas n-pentane 1 to 10 6 to 1 1 to 10 6 to 1
synthetic refinery gas nitrogen 10 to 700 1.6 to 0.4 10 to 700 1.6 to 0.4
synthetic refinery gas propane 1 to 50 4.5 to 1.6 1 to 50 4.5 to 1.6
synthetic refinery gas propene 5 to 100 3.2 to 0.4 5 to 100 3.2 to 0.4
  • Mechanism for measurement service delivery : NIM CRM
  • Approved on 10 March 2021
  • Institute service identifier : GAS 118
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 %
methane 1,3-butadiene 5 to 30 1.5 5 to 30 1.5
  • Mechanism for measurement service delivery : NIM CRM
  • Approved on 03 November 2014
  • Institute service identifier : GAS 52
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/g Absolute expanded uncertainty in mg/g Mass fraction in mg/g Absolute expanded uncertainty in mg/g
1-aminohydantoin hydrochloride (AHD) 1-aminohydantoin hydrochloride (AHD) 980 to 1000 1.0E1 to 6 994 6
  • Mechanism for measurement service delivery : GBW10104
  • Approved on 23 October 2019
  • Institute service identifier : HPC-246
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in ng/g Absolute expanded uncertainty in ng/g Mass fraction in ng/g Absolute expanded uncertainty in ng/g
human serum 17alpha- hydroxyprogesterone 0.51 to 1.65 2.0E-2 to 3.0E-2 0.51 to 1.65 2.0E-2 to 3.0E-2
  • Mechanism for measurement service delivery : GBW09829, GBW09830
  • Approved on 30 August 2017
  • Institute service identifier : Bio-49
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/g Absolute expanded uncertainty in mg/g Mass fraction in mg/g Absolute expanded uncertainty in mg/g
high purity 17alpha- hydroxyprogesterone 17alpha- hydroxyprogesterone 990 to 1000 1.0E1 to 2 993 1.0E1
  • Mechanism for measurement service delivery : Calibration and GBW09220
  • Approved on 23 October 2019
  • Institute service identifier : HPC-260
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in g/g Absolute expanded uncertainty in g/g Mass fraction in g/g Absolute expanded uncertainty in g/g
17beta-estradiol 17beta-estradiol 0.99 to 1 8.0E-3 to 3.0E-3 0.992 3.0E-3
  • Mechanism for measurement service delivery : CRM:GBW09223
  • Approved on 23 October 2019
  • Institute service identifier : HPC-276
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in % Absolute expanded uncertainty in % Mass fraction in % Absolute expanded uncertainty in %
high purity 2’-deoxyadenosine-5’-monophosphate 2’-deoxyadenosine 5’-monophosphate 95 to 100 1 to 0.8 98.72 0.8
  • Mechanism for measurement service delivery : GBW(E)100144
  • Approved on 23 October 2019
  • Institute service identifier : HPC(B)-7
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in % Absolute expanded uncertainty in % Mass fraction in % Absolute expanded uncertainty in %
high purity 2'-deoxycytidine 5'-monophosphate 2'-deoxycytidine 5'-monophosphate 95 to 100 1 to 0.8 99.64 0.8
  • Mechanism for measurement service delivery : GBW(E)100145
  • Approved on 23 October 2019
  • Institute service identifier : HPC(B)-8
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in % Absolute expanded uncertainty in % Mass fraction in % Absolute expanded uncertainty in %
high purity 2'-deoxyguanosine 5'-monophosphate 2'-deoxyguanosine 5'-monophosphate 95 to 100 1.1 to 0.9 99.38 0.9
  • Mechanism for measurement service delivery : GBW(E)100146
  • Approved on 23 October 2019
  • Institute service identifier : HPC(B)-9
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/g Absolute expanded uncertainty in mg/g Mass fraction in mg/g Absolute expanded uncertainty in mg/g
high purity 2,3,5- trimethylpyrazine 2,3,5-trimethylpyrazine 980 to 1000 1.0E1 to 5 997 5
  • Mechanism for measurement service delivery : GBW(E)10133
  • Approved on 23 October 2019
  • Institute service identifier : HPC-270
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in % Absolute expanded uncertainty in % Mass fraction in % Absolute expanded uncertainty in %
high purity 2,4-D butylate 2,4-D butylate 98 to 100 0.5 to 0.2 99.2 0.3
  • Mechanism for measurement service delivery : CRM:GBW(E)060616
  • Approved on 23 October 2019
  • Institute service identifier : HPC-54
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in g/g Absolute expanded uncertainty in g/g Mass fraction in g/g Absolute expanded uncertainty in g/g
3,4-methylenedioxymethamphetamine 3,4-methylenedioxymethamphetamine 0.99 to 1 7.0E-3 to 3.0E-3 0.998 3.0E-3
  • Mechanism for measurement service delivery : CRM:GBW09246
  • Approved on 23 October 2019
  • Institute service identifier : HPC-274
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in g/g Absolute expanded uncertainty in g/g Mass fraction in g/g Absolute expanded uncertainty in g/g
high purity 3-Amino-2-oxazolidinone (AOZ) 3-Amino-2-oxazolidinone (AOZ) 0.98 to 1 1.0E-2 to 5.0E-3 0.988 5.0E-3
  • Mechanism for measurement service delivery : GBW10079
  • Approved on 23 October 2019
  • Institute service identifier : HPC-167
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in g/g Absolute expanded uncertainty in g/g Mass fraction in g/g Absolute expanded uncertainty in g/g
high purity 3-Amino-5-morpholinomethyl-2-oxazolidinone (AMOZ) 3-Amino-5-morpholinomethyl-2-oxazolidinone (AMOZ) 0.99 to 1 2.0E-2 to 9.0E-3 0.994 9.0E-3
  • Mechanism for measurement service delivery : GBW10078
  • Approved on 23 October 2019
  • Institute service identifier : HPC-166
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in g/g Absolute expanded uncertainty in g/g Mass fraction in g/g Absolute expanded uncertainty in g/g
4-hydroxy-3-methoxymandelic acid 4-hydroxy-3-methoxymandelic acid 0.99 to 1 8.0E-3 to 3.0E-3 0.995 3.0E-3
  • Mechanism for measurement service delivery : CRM:GBW09226
  • Approved on 23 October 2019
  • Institute service identifier : HPC-279

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