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Preparation, homogeneity and stability studies of a candidate LRM for Se speciation

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Abstract

A laboratory reference material (LRM) was prepared from Brazil nuts (Bertholletia excelsa) for quality control (QC) purposes of selenium speciation. The preparation of this LRM led through the usual operation steps applied during routine reference material production from biota samples—preparation of the raw material, homogenisation, storage design, checking of homogeneity, microbiological status and possible irradiation effects, and monitoring the species stability vs time at different storage temperatures. The selenium speciation studies to check species stability were carried out on a HPLC–UV–HG–AFS measurement set-up. Special attention was paid to the correct identification of selenium species by applying independent HPLC separation techniques (ion-pairing and anion-exchange chromatography). The concentration of selenomethionine (SeMet) and total Se content were quantified (79.9 µg g−1 (calculated as Se) and 82.9 µg g−1, respectively). The homogeneity and stability of this candidate reference material passed the relevant tests recommended by Bureau Communautaire de Référence (BCR).

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Acknowledgements

The financial support of OTKA (Hungarian Scientific Foundation; T37216 and F32296) is gratefully acknowledged. E.T. Bodó acknowledges a fellowship from Bay Zoltán Foundation (Budapest, Hungary). The authors express their gratitude to Zsuzsanna Csabai and Csilla Szabó for their contribution to sample preparation, to Professor Hlavay for the loan of the AFS detector and to the Department of Microbiology of the Central Food Research Institute (Budapest, Hungary) for microbiological determinations and γ-irradiation.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Food Science, Szent István University, Villányi út 29–33, 1118, Budapest, Hungary

    Erzsébet Tünde Bodó, Zsolt Stefánka, Ildikó Ipolyi, Csilla Sörös, Mihály Dernovics & Péter Fodor

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  1. Erzsébet Tünde Bodó
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  2. Zsolt Stefánka
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  3. Ildikó Ipolyi
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  4. Csilla Sörös
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  5. Mihály Dernovics
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  6. Péter Fodor
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Corresponding author

Correspondence to Mihály Dernovics.

Additional information

This manuscript was awarded the Poster Prize at the 2003 Winter Conference on Plasma Spectrochemistry, Garmisch-Partenkirchen, Germany, January 12–17, 2003. Part of this study was presented at the 11th Biennial National Atomic Spectrometry Symposium, Loughborough, UK, July 8–11, 2002.

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Bodó, E.T., Stefánka, Z., Ipolyi, I. et al. Preparation, homogeneity and stability studies of a candidate LRM for Se speciation. Anal Bioanal Chem 377, 32–38 (2003). https://doi.org/10.1007/s00216-003-1941-y

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  • DOI: https://doi.org/10.1007/s00216-003-1941-y

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