The Effect of Simulated Digestion on Element Speciation in Rye Flakes

Authors

  • M. Juříček Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic
  • R. Koplík Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic
  • O. Mestek Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic

Abstract

To investigate element speciation in digested rye flakes, a simulated digestion using pig’s pepsin and pancreatin was performed at 37 °C. The digest was analyzed by SEC/ICP-MS (Superdex 75, 0.02 mol l-1 Tris-HCl buffer). Most elements in flakes are solubilized by enzymatic hydrolysis. P and Mo recoveries in SEC analysis of the digest approach to 100 %, those of Fe and Cu range from 60 to 80 % and that of Zn varies from 10 to 40 %. Ionic species or labile complexes were not recovered. The proportions of elements change as a result of enzyme digestion. No Fe is recovered in SEC analysis of flake extracts. Most Fe in the digest is bonded to a medium-molecular-weight fraction. Low-molecular-weight (<2 kDa) fractions with bonded Cu and Zn partly persist in the digest.

Published

2008-04-15

How to Cite

Juříček, M., Koplík, R., & Mestek, O. (2008). The Effect of Simulated Digestion on Element Speciation in Rye Flakes. Chemické Listy, 102(3). Retrieved from http://w.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/1676

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