Preparative liquid isoelectric focusing (Rotofor IEF) based Se-speciation of Se-enriched Agaricus bisporus

Valéria Gergely, Emese Kápolna, Andrea Süle, Gyöngyi Hajós, Mihály Dernovics, Péter Fodor

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Preparative isoelectric focusing (Rotofor) was introduced to carry out the prefractionation of a selenised edible mushroom Agaricus bisporus sample containing 1037 ± 31 (SD) μg Se g-1. The water-soluble part of the sample was separated by the free solution apparatus into 20 fractions on the base of the pi values of the sample components. The separation was followed by the determination of total Se, soluble protein (by Bradford method) and Se-speciation of the fractions, summed up in 14 pools according to the actual individual pH values. Proteolytic sample preparation was chosen prior to the speciation analysis carried out with the help of a HPLC-UV-HG-AFS system, applying cation and anion exchange chromatographies. Achieving 19% column recovery, the presence of Se(IV), selenomethionine, selenocystine and methylselenocysteine was detected, the latter for the first time in a mushroom sample.

Original languageEnglish
Pages (from-to)1485-1488
Number of pages4
JournalJournal of analytical atomic spectrometry
Issue number11
Publication statusPublished - Nov 1 2004


ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

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