<i>o</i>-スルホフェニルフルオロンを用いるゲルマニウム（IV）及び有機ゲルマニウムの吸光光度法による定量

Abstract

A novel spectrophotometric method was established for the determination of germanium(IV) and organogermanes. The method is based on ternary complex formation among germanium(IV), o-sulfophenylfluorone (SPF) and cetyltrimethylammonium chloride (CTAC). In the determination of germanium(IV), the absorbance at 530 nm obeyed Beer’s law in the range of 7.0−400 ng mL−1. The effective molar absorptivity at 530 nm and the relative standard deviation were 1.7 × 105 L mol−1 cm−1 and 0.96 % (n = 6), respectively. In the determination of propagermaniumu as organogermanes, the absorbance at 536 nm obeyed Beer’s law in the range of 30−1000 ng mL−1. The effective molar absorptivity at 536 nm and the relative standard deviation were 1.5 × 105 L mol−1 cm−1 and 1.13 % (n = 6), respectively. The recovery of germanium(IV) added to human urine was satisfactory being about 98 %. The proposed method requiring no solvent extraction should be useful for a simple and sensitive determinations of germanium(IV) and organogermanes.