锗(Ⅳ)-邻苯二酚紫-钒(Ⅳ)体系的极谱吸附催化波研究

Studies on the Polarographic Adsorptive Catalytic Wave of Germanium(Ⅳ) Pyrocatecholviolet Vanadium(Ⅳ)System

在０．１ｍｏｌ／ＬＨ２ＳＯ４溶液中，Ｇｅ（Ⅳ）－邻苯二酚紫（ＰＶ）－Ｖ（Ⅳ）体系产生一灵敏的吸附催化波，峰电位在－０．５５Ｖ（ｖｓ．ＳＣＥ）处．锗浓度在２．２×１０－１０～２．８×１０－６ｍｏｌ／Ｌ范围内与峰电流呈线性关系．检出限为１．１×１０－１０ｍｏｌ／Ｌ．研究了极谱波的性质．本法用于土壤中痕量锗的测定，结果满意．

In 0.1mol/L H 2SO 4 solution, a sensitive polarographic adsorptive catalytic wave of Ge(Ⅳ) PV V(Ⅳ) system was obtained by singe sweep polarography. The peak potential is at -0.55V (vs.SCE). The peak current was linearly related to the concentration of Ge(Ⅳ) in the range from 2.2×10 -10 to 2.8×10 -6 mol/L. The detection limit of Ge(Ⅳ) is 1.1×10 -10 mol/L. The polarographic property of the wave was studied. The method has been applied to the determination of trace amount of Ge in soil with satisfactory results.