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 × 10
5 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 × 10
5 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.
抄録全体を表示