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Key comparison CCQM-K60: Total selenium and selenomethionine in selenised wheat flour

This paper relates to work carried out under Project S1 – Novel selenium speciation methods and reference materials to support new food supplements and anti-cancer therapy of the NMS Chemical and Biological Metrology programme.

This paper reports on the key comparison CCQM-K60 to assess the analytical capabilities of the national measurement institutes (NMIs) to accurately quantitate the mass fraction of selenomethionine (SeMet) and total selenium (at low mg kg⁻¹ levels) in selenised wheat flour. The study was organized by the Inorganic Analysis Working Group (IAWG) of the Comité Consultatif pour la Quantité de Matière (CCQM). LGC Limited and the Institute for National Measurement Standards, National Research Council Canada (NRCC, Ottawa, Canada) acted as the coordinating laboratories.

Further information can be obtained from the BIPM website or by contacting the authors via the NMS helpdesk at LGC.