放射化分析による精製大豆油,ヒマワリ油およびナタネ油中のヒ素の定量

概要

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A method has been developed for quantitative determination of arsenic in refined soybean oil, sunflower oil and rape seed oil. The irradiation was carried out in TRIGA-II small reactor with neutron flux of 1011n/cm2/sec for 20 hours of the maximum irradiation time. After cooling, the sample was dissolved in acid by treating with nitric-sulfuric-perchloric acid under presence of carrier of the arsenic. The procedure for the distillation of arsenic is similar to that adopted by B. Sjostrand in his investigations on the recovery of arsenic from soybean oil, sunflower oil and rape seed oils. The mean chemical yield was maximum 82 percent for the arsenic, and the sensitivity of the method was 10-3 ppm. This method has an advantage in that it makes possible to minimize the loss and contamination.
日本油化学会の論文