A framework for the application and use of reference materials in analytical chemistry

ISO Guide 35 (2017) specifies conditions for the certification of matrix reference materials via information from proficiency tests. Many scientists involved in the provision of proficiency tests for analytical chemistry have concluded that the Guide 35 conditions are effectively fulfilled by identifying certified values with properly-derived consensus values. However, the claim that such reference materials are ‘certified’ is likely to be challenged by traditional metrologists. This paper proposes to move beyond this unresolved situation to put certification via proficiency testing on an unassailable footing. The proposal therefore is not a questionable fulfilment of the Guide 35 conditions but an unrelated paradigm for certification.

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The role of reference materials in analytical chemistry

Traceability in Chemical Measurement ◽

10.1007/3-540-27093-0_51 ◽

2003 ◽

pp. 279-283

Author(s):

A. Zschunke

Keyword(s):

Analytical Chemistry ◽

Reference Materials

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Sediment Reference Materials and the Canadian Marine Analytical Chemistry Standards Program

Chemical and Biological Characterization of Municipal Sludges, Sediments, Dredge Spoils, and Drilling Muds ◽

10.1520/stp26695s ◽

2008 ◽

pp. 27-27-8

Author(s):

P Greig Sim ◽

W David Jamieson ◽

SS Berman ◽

VJ Boyko

Keyword(s):

Analytical Chemistry ◽

Reference Materials

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Certification of Matrix Reference Materials in Chemical Measurement: A New Basis for Adopting a Consensus Value Derived from a Proficiency Test

10.26434/chemrxiv.8320610.v1 ◽

2019 ◽

Author(s):

Michael Thompson ◽

Philip Potts ◽

Peter Webb

Keyword(s):

Analytical Chemistry ◽

Proficiency Testing ◽

Reference Materials ◽

Proficiency Test ◽

Chemical Measurement ◽

Proficiency Tests ◽

Consensus Value ◽

Iso Guide 35 ◽

Consensus Values ◽

Certified Values

ISO Guide 35 (2017) specifies conditions for the certification of matrix reference materials via information from proficiency tests. Many scientists involved in the provision of proficiency tests for analytical chemistry have concluded that the Guide 35 conditions are effectively fulfilled by identifying certified values with properly-derived consensus values. However, the claim that such reference materials are ‘certified’ is likely to be challenged by traditional metrologists. This paper proposes to move beyond this unresolved situation to put certification via proficiency testing on an unassailable footing. The proposal therefore is not a questionable fulfilment of the Guide 35 conditions but an unrelated paradigm for certification.

Download Full-text