酸化ゲルマニウム中の微量リンの定量

概要

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Determination for trace amount of phosphorus in highly purified germanium oxide has been investigated. Colorimetric method with the molybdenum blue which was produced by extracting phosphomolybdate complex with butanol-chloroform solvent followed by reducing it with SnCl2 was carried out in this research. Disturbing influence of As, Si, Zr, W, V in this method was avoided by removing or masking these elements prior to colorimetric measurements. Vanadium, which interferes most severely was separated by oxine-chloroform extraction with satisfactory result. A procedure for determination of μg P in GeO2 was proposed. It was ascertained from results of analysis of GeO2 sample using 32P as a tracer that P, existing in order of 1 × 10-5 %, could be determined by this procedure with error less than ± 10 %.
社団法人日本分析化学会の論文