Zur quantitativen Vitamin-B1-Bestimmung in Nahrungsmitteln und biologischem Material
- 1 January 1979
- journal article
- abstracts
- Published by Springer Nature in Zeitschrift für Lebensmittel-Untersuchung und Forschung
- Vol. 168 (2) , 120-124
- https://doi.org/10.1007/bf01127517
Abstract
Eine fluorometrische Vitamin-B1-Bestimmungsmethode für Lebensmittel und biologisches Material wird beschrieben. Nach einer sauren und enzymatischen Freisetzung des Vitamins B1 im Analysengut wird das Vitamin an dem schwach sauren Kationenaustauscher Amberlite CG 50 von Störsubstanzen weitgehend gereinigt und zum fluorescierenden Derivat Thiochrom oxidiert. Das Verfahren ist einfach, reproduzierbar und wenig störanfällig. Die Recovery-Werte sind gut. A fluorometric method for the estimation of the vitamin B1 content in food and biological materials is described. Acid hydrolysis is followed by enzymatic treatment to liberate the vitamin B1 of the sample. Interfering substances in the extract are removed to a great extent by chromatography on Amberlite CG 50, a weakly acidic cation exchanger. After oxidation and extraction into an organic medium, the fluorescence of thiochrome is measured. The procedure is simple, reproducible and not susceptible to interference. The recoveries are good.Keywords
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