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Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Biological fluids and materials 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/kg Relative expanded uncertainty
(k = 2, 95%) in % 		Mass fraction in mmol/l Absolute expanded uncertainty
(k = 2, 95%) in mmol/l
human serum creatinine 4 to 7 3.7 0.0664 0.0032
Mechanism(s) for measurement service delivery: DMR 263a
Approved on 12 June 2007.
Internal NMI service identifier: CENAM/630-C014-001b
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 mg/g Relative expanded uncertainty
(k = 2, 95%) in %
iron molybdenum 2 to 11 2.8
Mechanism(s) for measurement service delivery: Analytical service, reference materials: DES-025, DES-026, DES-027, DES-028
Approved on 31 March 2012.
Internal NMI service identifier: CENAM/610-024
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Advanced materials for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Mass fraction in mg/kg Relative expanded uncertainty
(k = 2, 95%) in %
polyethylene mercury 300 to 600 3 to 5
Mechanism(s) for measurement service delivery: Value-assignment through MRTC program
MRTC program: certification of a batch produced and later distributed by an external manufacturer.
Uncertainty convention 1.
Approved on 31 March 2012.
Internal NMI service identifier: CENAM/620-Q004-1
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
Mass fraction in % Absolute expanded uncertainty
(k = 2, 95%) in %
p-xylene p-xylene 98.0 to 100 0.1 to 0.6
Mechanism(s) for measurement service delivery: DMR-232
Uncertainty range convention 1.
Approved on 29 April 2005.
Internal NMI service identifier: CENAM/630-C014-003
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 %
solvent solution cis-chlordane 10 to 600 2 to 10
Mechanism(s) for measurement service delivery: Analytical services, PT 630-IL-1203
Uncertainty convention 1. Approved on 01 March 2005.
Internal NMI service identifier: CENAM/630-Q021-005
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 mg/g Relative expanded uncertainty
(k = 2, 95%) in %
aluminum zinc 0.4 to 1.7 1.4
Mechanism(s) for measurement service delivery: Analytical service, reference materials: DES-036, DES-037, DES-038, DES-039, DES-040, DES-052, DES-053, DES-054, DES-055, DES-056, DES-057, DES-058, DES-059, DES-060, DES-061, DES-062, DES-063, DES-064, DES-065, DES-066
Approved on 12 June 2007.
Internal NMI service identifier: CENAM/610-025
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for pH for Mexico (.PDF file)
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH Absolute expanded uncertainty
(k = 2, 95%) 		pH Absolute expanded uncertainty
(k = 2, 95%)
aqueous pH buffer solution 10.000 to 10.040 0.007 10.000 to 10.040 0.007 to 0.010
Mechanism(s) for measurement service delivery: DMR-324 I / II
Temperature range for service: 15 °C to 37 °C, values given for 25°C.
Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention (~0.010, k=2).
Uncertainty convention 1.
Approved on 31 March 2012.
Internal NMI service identifier: CENAM/630-Q024-001.P10
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
Mass fraction in % Absolute expanded uncertainty
(k = 2, 95%) in %
benzene benzene 98.0 to 100 0.1 to 0.6
Mechanism(s) for measurement service delivery: DMR-284a
Uncertainty range convention 1.
Approved on 29 April 2005.
Internal NMI service identifier: CENAM/630-C014-004
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Advanced materials for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Mass fraction in mg/kg Relative expanded uncertainty
(k = 2, 95%) in %
ceramics aluminum 700 to 1000 4 to 5
Mechanism(s) for measurement service delivery: Value-assignment through MRTC program
MRTC program: certification of a batch produced and later distributed by an external manufacturer.
Uncertainty convention 1.
Approved on 31 March 2012.
Internal NMI service identifier: CENAM/610-038
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 sustance fraction in µmol/mol Relative expanded uncertainty
(k = 2, 95%) in %
nitrogen propane 50 to 50000 2
Mechanism(s) for measurement service delivery: Program for value-assignment to gas mixture from producers (MRTC), calibration services and analytical services
Approved on 27 March 2013.
Internal NMI service identifier: CENAM/630-QS01.G003
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Biological fluids and materials for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Mass fraction in mg/kg Relative expanded uncertainty
(k = 2, 95%) in %
human serum creatinine 20 to 40 2.7
Mechanism(s) for measurement service delivery: Proficiency test and analytical service
Approved on 12 June 2007.
Internal NMI service identifier: CENAM/630-C014-002b
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Food 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 µg/g Relative expanded uncertainty
(k = 2, 95%) in % 		Mass fraction in µg/g Absolute expanded uncertainty
(k = 2, 95%) in %
milk powder vitamin E (a-tocopherol) 11 to 400 11 to 17 34 to 80 11 to 17
Mechanism(s) for measurement service delivery: DMR-273a, DMR-274a, Proficiency test 630-Q016-005-PA
Uncertainty range convention 1.
Approved on 01 March 2005.
Internal NMI service identifier: CENAM/630-Q016-001
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 %
solvent solution trans-nonachlor 10 to 600 1 to 10
Mechanism(s) for measurement service delivery: Analytical services, PT 630-IL-1203
Uncertainty convention 1. Approved on 01 March 2005.
Internal NMI service identifier: CENAM/630-Q021-006
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 mg/g Relative expanded uncertainty
(k = 2, 95%) in %
aluminum copper 0.1 to 1.5 3.2
Mechanism(s) for measurement service delivery: Analytical service, reference materials: DES-036, DES-037, DES-038, DES-039, DES-040, DES-052, DES-053, DES-054, DES-055, DES-056, DES-057, DES-058, DES-059, DES-060, DES-061, DES-062, DES-063, DES-064, DES-065, DES-066
Approved on 12 June 2007.
Internal NMI service identifier: CENAM/610-026
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for pH for Mexico (.PDF file)
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
pH Absolute expanded uncertainty
(k = 2, 95%) 		pH Absolute expanded uncertainty
(k = 2, 95%)
aqueous pH buffer solution 4.000 to 4.030 0.011 4.000 to 4.030 0.012
Mechanism(s) for measurement service delivery: MRTC program (certification of a batch produced and latter distributed by an external manufacturer)
Temperature range for service and given values: 25°C.
Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention (~0.010, k=2).
Uncertainty convention 1.
Approved on 31 March 2012.
Internal NMI service identifier: CENAM/630-Q024- 001.s4
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Advanced materials for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Mass fraction in mg/kg Relative expanded uncertainty
(k = 2, 95%) in %
ceramics calcium 40 to 120 6 to 7
Mechanism(s) for measurement service delivery: Value-assignment through MRTC program
MRTC program: certification of a batch produced and later distributed by an external manufacturer.
Uncertainty convention 1.
Approved on 31 March 2012.
Internal NMI service identifier: CENAM/610-039
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 sustance fraction in µmol/mol Relative expanded uncertainty
(k = 2, 95%) in %
nitrogen carbon dioxide 100 to 200000 1.5
Mechanism(s) for measurement service delivery: Program for value-assignment to gas mixture from producers (MRTC), calibration services and analytical services
Approved on 27 March 2013.
Internal NMI service identifier: CENAM/630-QS01.G004
Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Chemistry for Food for Mexico (.PDF file)
Matrix or material Analyte or component Dissemination range of measurement capability
Mass fraction in mg/kg Relative expanded uncertainty
(k = 2, 95%) in %
sea food zinc 30 to 90 3.6 to 5
Mechanism(s) for measurement service delivery: Value-assignment through MRTC program and PT program
Uncertainty range convention 1.
Approved on 24 June 2008.
Internal NMI service identifier: CENAM/620-Q008-19
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 %
solvent solution 4,4'-DDD 10 to 600 1 to 10
Mechanism(s) for measurement service delivery: Analytical services, PT 630-IL-1203
Uncertainty convention 1. Approved on 01 March 2005.
Internal NMI service identifier: CENAM/630-Q021-008
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
Mass fraction in % Absolute expanded uncertainty
(k = 2, 95%) in %
toluene toluene 98.0 to 100 0.1 to 0.6
Mechanism(s) for measurement service delivery: DMR-285a
Uncertainty range convention 1.
Approved on 29 April 2005.
Internal NMI service identifier: CENAM/630-C014-005