摘要
砷（Ⅲ）在１．５×１０－４ｍｏｌ／ＬＣｏ（Ⅱ）－０．１ｍｏｌ／ＬＫＣＮＳ－１％抗坏血酸－０．７ｍｏｌ／ＬＮａ２ＳＯ４－４×１０－３ｍｏｌ／ＬＮａＢｒ介质中产生一灵敏催化波，峰电位为－１．１Ｖ（ｖｓ．Ａｇ／ＡｇＣｌ）。采用微分脉冲极谱法研究了各项实验条件，建立了直接测定硫中微量砷的方法。该法简便快速，结果满意。
A sensitive catalytic wave of arsenic has been obtained in 1.5×10 -4 mol/L Co(Ⅱ) 0 1mol/L KCNS 1% ascorbic acid 0.7mol/L Na 2SO 4 4×10 -8 mol/L NaBr system, E p is 1.1V( vs. Ag/AgCl).Experiment conditions using differential pulse polarography have been studied.The direct determination of trace arsenic in sulphur without separation was established.This method is rapid,simple and satisfactory.
出处
《分析试验室》
CAS
CSCD
1997年第1期62-64,共3页
Chinese Journal of Analysis Laboratory
关键词
极谱催化波
微分脉冲极谱法
硫
砷
Polarographic catalytic wave
arsenic
sulphur
differential pulse polarography
