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Bestimmung der durch Flavonoide komplexierten Metalle in Zwiebeln mit Totalreflexions-Röntgenfluorescenzanalyse (TRFA)

Determination of flavonoid-coordinated metals in onions by means of total-reflection-X-ray-fluorescence (TXRF)

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Summary

Flavonoid-complexes of metals were extracted from powdered onions by methanol/water. After further extraction with chloroform and internal standardization with gallium-oxinate iron, copper, zinc and calcium were directly determined in the ng/g range by TXRF. Parallel determination of copper by means of flame-AAS gave consistent results with the TXRF analysis. After addition of 5 μm copper to 2 g sample, 56% of the copper was coordinated by flavonoids.

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Authors and Affiliations

  1. Institut für Spektrochemie und angewandte Spektroskopie, Bunsen-Kirchhoff-Strasse 11, D-4600, Dortmund 1, Bundesrepublik Deutschland

    R. Eller & G. Weber

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  1. R. Eller
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  2. G. Weber
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Eller, R., Weber, G. Bestimmung der durch Flavonoide komplexierten Metalle in Zwiebeln mit Totalreflexions-Röntgenfluorescenzanalyse (TRFA). Z. Anal. Chem. 328, 492–494 (1987). https://doi.org/10.1007/BF00475971

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  • DOI: https://doi.org/10.1007/BF00475971

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