砷的氢催化波研究及硫中微量砷的测定  

Catalytic Hydrogen wave of Arsenic and Determination of Trace Arsenic in Sulphur

作　　者：杨生恕[1] 俞征[1] 

机构地区：[1]贵州大学化学系

出　　处：《分析试验室》1997年第1期62-64,共3页Chinese Journal of Analysis Laboratory

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.

关 键 词：极谱催化波 微分脉冲极谱法 硫 砷 

分 类 号：O613.51[理学—无机化学] O657.14[理学—化学]