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1 引言 利用电位溶出分析法测定锗的方法,至今尚未见报道,本文在阳极溶出伏安法的启发下进行了试探,结果发现,在pH10.5左右的硼砂缓冲溶液中,在溶解氧的存在下,于-0.98V和-0.35V(相对SCE)左右出现两个溶出峰,因溶解氧对两个峰的氧化能力不同,使两峰的灵敏度不同:P_15～140ng/ml及P_20.5～120ng/ml的范围内有良好的线性关系,可检出0.1ng/ml的锗。本文采用此法成功地直接测定了尿中锗,方法不用除氧,简单快速准确,其回收率在95％～106%。
1 Introduction The method for the determination of germanium by potentiometric stripping analysis has not been reported so far. This paper attempts to explore the anodic stripping voltammetry and found that in the presence of dissolved oxygen at pH 10.5 in borax buffer, , There are two dissolution peaks around -0.98V and -0.35V (relative to SCE). The sensitivity of the two peaks is different due to the different oxidizing ability of dissolved oxygen to the two peaks: P_15 ~ 140ng / ml and P_20.5 ~ There is a good linear relationship in the range of 120 ng / ml, with germanium detected at 0.1 ng / ml. In this paper, the method of direct determination of germanium in urine, the method does not deoxygenation, simple and quick and accurate, the recovery rate of 95% to 106%.