Abstract
Three very accurate (definitive) methods by RNAA for the determination of Se, As and Fe respectively, which were recently elaborated in our laboratory, are reviewed and their use in certification of reference materials and in checking the assigned values in proficiency tests is demonstrated on several examples. According to VIM 3 nomenclature these methods may be called: ratio primary reference measurement procedures (RPRMPs). RPRMPs with their expanded uncertainties of 2.7–3.6 % are comparable to ID-MS methods and are the only methods of such high metrological quality which can be used for the determination of trace amounts of monoisotopic elements.
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Acknowledgements
The financial support of the MODAS Project financed by the National Center for Research and Development is gratefully acknowledged.Thanks are due to Dr Z. Samczyński for pictorial representation of the RPRMP for selenium quoted in this work.
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Dybczyński, R.S., Polkowska-Motrenko, H., Chajduk, E. et al. Recent advances in ratio primary reference measurement procedures (definitive methods) and their use in certification of reference materials and controlling assigned values in proficiency testing. J Radioanal Nucl Chem 302, 1295–1302 (2014). https://doi.org/10.1007/s10967-014-3607-y
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DOI: https://doi.org/10.1007/s10967-014-3607-y