Bestimmung von reduziertem und oxydiertem Glutathion in Weizenmehlen und -teigen
- 1 January 1978
- journal article
- abstracts
- Published by Springer Nature in Zeitschrift für Lebensmittel-Untersuchung und Forschung
- Vol. 167 (2) , 87-92
- https://doi.org/10.1007/bf01136133
Abstract
A quantitative method for the analysis of reduced (GSH) and oxidised (GSSG) glutathione in cereals has been developed. The steps are: Extraction of the flour or dough and carboxymethylation of GSH, gel filtration on Sephadex G-50, chromatography on Dowex 50 WX8 and after basic cleavage determination of the separated GSSG with 5,5′-dithio-bis(2-nitrobenzoic acid), separation of carboxymethylated GSH on Dowex 1X8 and determination with 2,4,6-trinitrobenzenesulfonic acid. When analysing for the amount of GSH and GSSG in flours of three varieties of wheat the former ranged from 0.27 to 0.46 μmol/g and the latter from 0.26 to 0.38 μmol/g. After kneading for 5 min to a dough the GSH disappeared with a corresponding increase in GSSG. Für die quantitative Analyse von reduziertem (GSH) und oxydiertem (GSSG) Glutathion in Cerealien wurde das folgende Verfahren entwickelt: Extraktion eines Mehles oder Teigs und Carboxymethylierung des GSH, Gelfiltration an Sephadex G-50, Chromatographic an Dowex 50 WX8 und nach alkalischer Spaltung Bestimmung des abgetrennten GSSG mit 5,5′-Dithio-bis(2-nitrobenzoesaure), Abtrennung des carboxymethylierten GSH an Dowex 1X8 und Bestimmung mit 2,4,6-Trinitrobenzoesulfonsäure. In drei Sorten von Weizenmehlen wurden 0,27–0,46 μmol/g GSH and 0,26–0,38 μmol/g GSSG gefunden. Beim Kneten (5 min) verschwand das GSH und das GSSG nahm entsprechend zu.Keywords
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