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Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Water for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass concentration in mg/l Relative expanded uncertainty
(k = 2, 95%) in % 		Mass concentration in mg/l Absolute expanded uncertainty
(k = 2, 95%) in %
acidic (H2SO4) aqueous solution COD (expressed as reduction capacity of potassium biphthalate) 100 to 300 3 to 6 300 3
Mechanism(s) for measurement service delivery: DMR-6
Approved on 27 March 2013.
Uncertainty convention 1.
Internal NMI service identifier: CENAM/620-Q012-001
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Sediments, soils, ores, and particulates for Mexico (.PDF file)
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
(k = 2, 95%) in mg/g 		Mass fraction in mg/g Absolute expanded uncertainty
(k = 2, 95%) in mg/g
calcium carbonate total magnesium as magnesium oxide 7.0 to 8.4 0.3 7.15 to 7.60 0.23 to 0.29
Mechanism(s) for measurement service delivery: DMR 59a, DMR 64a
Uncertainty convention 1.
Internal NMI service identifier: CENAM/610-006
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Organic solutions for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in ng/g Relative expanded uncertainty
(k = 2, 95%) in % 		Mass fraction in µg/g Absolute expanded uncertainty
(k = 2, 95%) in µg/g
organic solution 4,4'-DDT 10 to 600 3 to 1 33269 0.0598
Mechanism(s) for measurement service delivery: DMR 277a
Uncertainty convention 2. Approved on 03 November 2006.
Internal NMI service identifier: CENAM/630-Q021-009
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for High purity chemicals for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in % Relative expanded uncertainty
(k = 2, 95%) in % 		Mass fraction in % Absolute expanded uncertainty
(k = 2, 95%) in %
2-methyl-1-propanol 2-methyl-1-propanol 98 to 100 0.3 to 1 99.84 0.1
Mechanism(s) for measurement service delivery: Analytical service, DMR-165 x
Uncertainty range convention 1.
Approved on 03 November 2006.
Internal NMI service identifier: CENAM/630-C014-012
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Gases for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Amount-of-substance in cmol/mol Relative expanded uncertainty
(k = 2, 95%) in %
synthetic natural gas n-butane 0.05 to 1.5 0.8 to 1.3
Mechanism(s) for measurement service delivery: MRTC-Program and analytical services
Uncertainty convention 1.
Approved on 19 July 2010.
Internal NMI service identifier: CENAM/630-QS01.G-007
This displays only one part of a multi-component CMC.
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Gases for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Amount-of-substance in cmol/mol Relative expanded uncertainty
(k = 2, 95%) in %
synthetic natural gas i-butane 0.05 to 1.5 0.8 to 1.4
Mechanism(s) for measurement service delivery: MRTC-Program and analytical services
Internal NMI service identifier: CENAM/630-QS01.G-007
This displays only one part of a multi-component CMC.
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Gases for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Amount-of-substance in cmol/mol Relative expanded uncertainty
(k = 2, 95%) in %
synthetic natural gas propane 0.1 to 5 0.92 to 1.21
Mechanism(s) for measurement service delivery: MRTC-Program and analytical services
Internal NMI service identifier: CENAM/630-QS01.G-007
This displays only one part of a multi-component CMC.
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Metals and metal alloys for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Mass fraction in % Relative expanded uncertainty
(k = 2, 95%) in %
copper alloy iron 0.1 to 0.5 3.5 to 2.5
Mechanism(s) for measurement service delivery: Value-assignment through MRTC program
Approved on 19 July 2010.
Uncertainty convention 2.
Internal NMI service identifier: CENAM/620-C002-19
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Gases for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Amount-of-substance in cmol/mol Relative expanded uncertainty
(k = 2, 95%) in %
synthetic natural gas ethane 1 to 20 0.8 to 1.14
Mechanism(s) for measurement service delivery: MRTC-Program and analytical services
Internal NMI service identifier: CENAM/630-QS01.G-007
This displays only one part of a multi-component CMC.
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Gases for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Amount-of-substance in cmol/mol Relative expanded uncertainty
(k = 2, 95%) in %
synthetic natural gas carbon dioxide 0.1 to 5 0.6 to 0.8
Mechanism(s) for measurement service delivery: MRTC-Program and analytical services
Internal NMI service identifier: CENAM/630-QS01.G-007
This displays only one part of a multi-component CMC.
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Gases for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Amount-of-substance in cmol/mol Relative expanded uncertainty
(k = 2, 95%) in %
synthetic natural gas nitrogen 1 to 20 0.9 to 1.2
Mechanism(s) for measurement service delivery: MRTC-Program and analytical services
Internal NMI service identifier: CENAM/630-QS01.G-007
This displays only one part of a multi-component CMC.
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Organic solutions for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Mass fraction in ng/g Relative expanded uncertainty
(k = 2, 95%) in %
organic solution PCB 105 90 to 1000 7 to 1
Mechanism(s) for measurement service delivery: Analytical service
Uncertainty convention 2. Approved on 03 November 2006.
Internal NMI service identifier: CENAM/630-QS03.003
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for High purity chemicals for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in % Relative expanded uncertainty
(k = 2, 95%) in % 		Mass fraction in % Absolute expanded uncertainty
(k = 2, 95%) in %
1-pentanol 1-pentanol 98 to 100 0.3 to 1 99.24 0.1
Mechanism(s) for measurement service delivery: Analytical service, DMR-165 x
Uncertainty range convention 1.
Approved on 03 November 2006.
Internal NMI service identifier: CENAM/630-C014-013
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Gases for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Amount-of-substance in cmol/mol Relative expanded uncertainty
(k = 2, 95%) in %
synthetic natural gas methane 70 to 98 0.4 to 0.7
Mechanism(s) for measurement service delivery: MRTC-Program and analytical services
Internal NMI service identifier: CENAM/630-QS01.G-007
This displays only one part of a multi-component CMC.
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Sediments, soils, ores, and particulates for Mexico (.PDF file)
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
(k = 2, 95%) in mg/g 		Mass fraction in mg/g Absolute expanded uncertainty
(k = 2, 95%) in mg/g
calcium carbonate total aluminum as aluminum oxide 3.2 to 24.3 0.3 to 0.7 3.48 to 22.1 0.27 to 0.7
Mechanism(s) for measurement service delivery: DMR 59a, DMR 64a
Uncertainty convention 1.
Internal NMI service identifier: CENAM/610-007
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Metals and metal alloys for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Mass fraction in % Relative expanded uncertainty
(k = 2, 95%) in %
copper alloy lead 1 to 2.5 4 to 3
Mechanism(s) for measurement service delivery: Value-assignment through MRTC program
Approved on 19 July 2010.
Uncertainty convention 2.
Internal NMI service identifier: CENAM/620-C002-20
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Inorganic solutions for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass concentration in mg/L Relative expanded uncertainty
(k = 2, 95%) in % 		Mass concentration in mg/L Absolute expanded uncertainty
(k = 2, 95%) in %
HNO3 in aqueous solution arsenic 0.10 to 1.00 1.8 to 3.0 0.100 to 1.000 2.0 to 3.5
Mechanism(s) for measurement service delivery: DMR-8, DMR-341, DMR-400, DMR-171: annual PT
Uncertainty convention 1.
Approved on 27 March 2013.
Internal NMI service identifier: CENAM/620-Q008-009
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Organic solutions for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Mass fraction in ng/g Relative expanded uncertainty
(k = 2, 95%) in %
organic solution PCB 153 90 to 1000 4 to 1
Mechanism(s) for measurement service delivery: Analytical service
Uncertainty convention 2. Approved on 03 November 2006.
Internal NMI service identifier: CENAM/630-QS03.004
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for High purity chemicals for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in % Relative expanded uncertainty
(k = 2, 95%) in % 		Mass fraction in % Absolute expanded uncertainty
(k = 2, 95%) in %
1-butanol 1-butanol 98 to 100 0.3 to 1 99.79 0.1
Mechanism(s) for measurement service delivery: Analytical service, DMR-165 x
Uncertainty range convention 1.
Approved on 03 November 2006.
Internal NMI service identifier: CENAM/630-C014-014
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Metals and metal alloys for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Mass fraction in % Relative expanded uncertainty
(k = 2, 95%) in %
copper alloy nickel 0.05 to 0.2 7.5 to 4.5
Mechanism(s) for measurement service delivery: Value-assignment through MRTC program
Approved on 19 July 2010.
Uncertainty convention 2.
Internal NMI service identifier: CENAM/620-C002-21