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CMCs Chemistry (6)
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Density
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sediment
organic solution, multi-component
aqueous pH buffer solution (6)
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Mexico (6)
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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 0.011
Mechanism(s) for measurement service delivery: DMR 283
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.p4

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 6.840 to 6.900 0.003 to 0.010 6.840 to 6.900 0.005
Mechanism(s) for measurement service delivery: DMR 206
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.p7

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 9.080 to 9.260 0.003 to 0.010 9.080 to 9.260 0.003 to 0.010
Mechanism(s) for measurement service delivery: DMR 358
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.p9

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 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 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 6.840 to 6.900 0.010 6.840 to 6.900 0.011 to 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.s7