Certification of reference materials for inorganic trace analysis: the INCT approach |
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Authors: | Halina Polkowska-Motrenko Rajmund S Dybczyński Ewelina Chajduk |
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Institution: | (1) Laboratory of Nuclear Analytical Methods, Institute of Nuclear Chemistry and Technology, Warsaw, Poland |
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Abstract: | This paper presents the work done by the Institute of Nuclear Chemistry and Technology (INCT), Warsaw on a procedure of the
certification of matrix reference materials (CRMs) for inorganic trace analysis. The INCT has been involved in preparation
and certification of that type of CRMs since 1986 till now. The certification of CRMs is performed on the basis of statistical
evaluation of the data obtained from the worldwide interlaboratory comparison. The initially adopted certification procedure
has been developed, and the final shape is presented and discussed. The modifications are connected with the new demands of
the international standards. The results of analysis of candidate CRMs obtained by the potentially primary procedures based
on radiochemical neutron activation analysis (RNAA) and results of analysis of CRM accompanying candidate RMs are applied
in the certification process for quality assurance purpose. |
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