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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

preprint
submitted on 25.06.2019 and posted on 26.06.2019 by Michael Thompson, Philip Potts, Peter Webb

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.

Funding

None

History

Email Address of Submitting Author

m.thompson@bbk.ac.uk

Institution

Birkbeck University of London

Country

UK

ORCID For Submitting Author

0000-0001-9631-2487

Declaration of Conflict of Interest

No conflict of interest.

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