原子吸光分析法による玄米中のマンガン,銅,鉛,亜鉛およびカドミウムの同時定量

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The optimum conditions for the determination of manganese, copper, lead and zinc in unpolished rice by atomic absorption spectrophotometry were investigated, and the satisfactory result was obtained in accuracy and rapidness.<BR>The metals in the samples were extracted by nitric acid for the analysis of atomic absorption spectrophotometry, after ashing them by a low temperature asher using the oxygen plasma.<BR>The mean values of the recovery rates in ten experiments for manganese, copper, lead and zinc were 99.3%, 100.5%, 98.3%, and 101.6%, respectively, and liner calibration curves were obtained in the range from 0.5ppm to 2.0ppm for manganese and zinc, and from 1.0ppm to 4.0ppm for copper and lead.<BR>From these results, it was found that the low temperature ashing-acid extraction method is available for the simultaneous determinations of several metals in the unpolished rice.<BR>The concentration of heavy metals in the 60 samples of unpolished rice were determined by the method above mentioned.
公益社団法人日本食品衛生学会の論文