文章基本信息

标题：ニッケル添加湿式灰化及び炭素炉原子吸光法による食品中総ヒ素の定量法
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作者：大久保登 ; 川端伸子 ; 越田恭子等
期刊名称：Journal of Health Science
印刷版ISSN：1344-9702
电子版ISSN：1347-5207
出版年度：1985
卷号：31
期号：4
页码：274-277
DOI：10.1248/jhs1956.31.274
出版社：The Pharmaceutical Society of Japan
摘要：Wet digestion with nickel ion and atomic absorption spectrophotometric conditions with a graphite furnace (AAS-GF) were investigated in order to determine total arsenic in food samples. Food sample (1-5 g) was taken into 50 ml beaker and nickel nitrate solution (500 mg as Ni), 10 ml HNO₃, 1 ml H₂SO₄, and 5 ml HClO₄ (60%) were added and heated for 7-10 h at 190°C on a sand bath. The digested sample was filled up to 100 ml with water. Aliquot of sample is determined as follows. AAS-GF conditions : dry : 150°C, 25 A, 40 s ; ash : 1640°C, 120 A, 30 s, atom. : 2800°C, 310 A, 5 s ; sheath gas : argon, 3.01/min ; injection volume : 10 μl ; absorption wavelength : 193.7 nm. The loss of arsenic during the wet digestion was avoided by addition of nickel ion to sample, and when the arsenic was determined by AAS-GF, the effect of nickel ion resulting in an increase on absorption signal of arsenic was found. The results described above were obtained from the cross-check study on the method of Hirayama et al. proposed to the Pharmaceutical Society of Japan in order to establish the determination method of arsenic in food samples which would be adopted in the Standard Method of Analysis of Hygienic Chemists authorized by the same society.
关键词：total arsenic;food sample;atomic absorption spectrophotometry;graphite furnace;nickel ion;wet digestion