摘要
利用玻碳镀金膜电极电位溶出分析法测定锗，在ｐＨ９．８的硼砂—氢氧化钠缓冲溶液中，采用同步镀金膜，富集电位—１．３０ｖ（对Ａｇ／ＡｇＣｌ），以溶液中溶解氧为氧化剂，在－０．２０Ｖ和－０．８５Ｖ处出现两个溶出信号，取－０．８５Ｖ的溶出信号进行定量分析，锗的浓度在１．０×１０￣－５～１．０×１．０￣－７ｍｏｌ／Ｌ范围内与溶出信号有良好的线性关系，检出限为５．０×１０￣－８ｍｏｌ／Ｌ。该方法用于有机锗、康寿茶、蘑菇、牡蛎等样品分析，并用分光光度法作对照，标准回收率为９５．８％～１００．０％。
Potentiometric Stripping analysis was applied to detemination of Germanium in a boraxbuffer solution(pH9.8)at plating potential of-1.30V(vs.Ag/AgCl),with dissolved oxygenas oxidant,Two stripping signals were observed at potentials-0.20V and-0.85V。The latterwas used for quantitative analysis.The stripping signal increased linearly with the concentiationof Germanium from 1.0×10￣-7mol/L。The detection limit for germaniumwas 5.0 ×10￣-8mol/L。Ge-containing sampleS were analysed by the proposed and agreementwith results obtained by spectrophotometry was excellent.The recovery of the method was95.8%～100.0%。
出处
《暨南大学学报（自然科学与医学版）》
CAS
CSCD
1995年第3期73-76,共4页
Journal of Jinan University(Natural Science & Medicine Edition)
关键词
锗
电位溶出法
金膜电极
测定
Germanium
potentio,etric stripping analysis
gold-film electrode
