医療用食品及び穀類中クロムの高感度・簡便分析法について : グラファイトファーネス原子吸光光度法

概要

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A high sensitive and simple method for the determination of chromium in fluid food for medical care and grains was examined by using a technique of graphite furnace atomic absorption spectrometry. The fixed-quantity limit for each sample was 1.0, μg/100g(=10ppb), and 20 samples were determined only within a day. There was little interference by coexisting elements (ex. sodium, phosphorus, potassium and calcium), even in the presence of 100,000 double concentrations. The result of the recovery test showed a good consistence with the reference value of the standard sample (CRM). It was therefore judged that present method could be practically employed as a highly sensitive and simple method for the determination of chromium. The fixed-quantity limit could be set lower, if the level of contamination was reduced. The chromium concentrations were 1.3-10.3 μg /100g in fluid food, 0.8-3.7 μg /100g in fortification food, 1.4-22μg /100g in grains.
2008-04-30