分別溶解/誘導結合プラズマ発光分析法による炭酸塩岩石標準試料中の炭酸塩態成分の定量

概要

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A selective chemical leaching technique using 1 M acetic acid or a pH 5 acetate buffer solution (mixture of 1 M acetic acid and ammonium acetate) and an ICP-AES determination were applied to carbonate rock reference samples. In 1 M acetic acid digestion, P_2O_5 and some components show increased values with an increasing solution/sample ratio. This suggested that much attention should be given to not only the used acid and solution species but also to the solution/sample ratio. The analytical precisions for MgO, Fe_2O_3, Mn, Sr and Ba were good. However, those for low level components showed a worse precision. The Ba content in pH 5 acetate buffer solution digestion gave higher values than in 1 M acetic acid digestion. This may have been caused by the difference in the barite solubility in those two digestion solutions.
社団法人日本分析化学会の論文
1998-07-05