ヒ素分析における鉄の影響

概要

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Arsenic content in a mixed solution, which consisted 0〜200μg of Fe (III) and 1.0μg of arsenic each, was determined by continuous flow-hydride generation-atomic absorption spectrometry. On the next day, the arsenic content in the mixed solution was also determined. No consistent analytical results of the arsenic content were obtained with respect to the quantity ratio of arsenic and Fe (III) amount. The reaction between arsenic and Fe (III) proceeded with the passage of time. The highest decrease rate of arsenic content on the day was 17.8 %, and the next day was 78.3 %, respectively. By an addition of ascorbic acid to the mixed solution, Fe (III) was reduced to Fe (II). For this reason, any decrease of the arsenic analytical result was not observed. Total arsenic in mannentake extract, which contained 269μg/g of Fe, was 0.67μg/g. On the other hand, when the ascorbic acid was added to the mannentake extract test solution before neutralization step, the total arsenic in the mannentake extract was 0.82μg/g.
日本食品化学学会の論文
2004-04-27