锗（Ⅳ）－3，4－二羟基苯甲酸－钒（Ⅴ）－EDTA体系极谱吸附催化波的研究  

Studies on the Polarographic Adsorptive Catalytic Wave of Germanium(Ⅳ)-3,4-Dihydroxybenzoic Acid (DHBA)-V(Ⅴ)-EDTA System

作　　者：李益恒[1] 朱志伟[1] 

机构地区：[1]湘潭大学化学系

出　　处：《分析科学学报》1995年第1期51-54,共4页Journal of Analytical Science

摘　　要：在ｐＨ３．１的甲酸盐缓冲溶液中，Ｇｅ（Ⅳ）－３，４－二羟基苯甲酸－Ｖ（Ⅴ）－ＥＤＴＡ体系产生一灵敏的吸附平行催化波，峰电位在－０．７０Ｖ（ｖｓ．ＳＣＥ），二次导数波高与锗浓度在２．５×１０－１０～４．０×１０－７ｍｏｌ／Ｌ范围内呈线性关系，检测限为１×１０－１０ｍｏｌ／Ｌ。研究了电极过程机理，用本法测定了矿泉水中的痕量锗，结果满意。A sensitive polarographic adsorptive catalytic wave of Ge(Ⅳ)-DHBA complex was ob tained by single-sweep polarography in 0.05mol/L formate buffer solution containing 2.0 × 10-3mol/L DHBA, 4.8×10-4mol/L V(Ⅴ) and 4.0×10-3mol/L EDTA at pH3.1. The peak potential appears at -0.70V (vs. SCE). The peak height is propotional to the concentration of Ge(Ⅳ) over the range from 2.5×10-10 to 4.0×10-7mol/L. The detection limit for Ge(Ⅳ) is as low as 1×10-10mol/L. The electrode processes of the adsorptive catalytic wave may be presented as follow:where H3L is DHBA.

关 键 词：锗 二羟基苯甲酸 钒 EDTA 极谱法 矿泉水 

分 类 号：O614.431[理学—无机化学] O657.1[理学—化学]