乙醇对砷锑钼蓝测砷法的增敏作用研究及其应用

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (3): 221.

乙醇对砷锑钼蓝测砷法的增敏作用研究及其应用

孙挺¹, 汪炳武²

1. 东北工学院化学系;
2. 中国科学院长春应用化学研究所

收稿日期:1985-10-08 出版日期:1987-03-24 发布日期:1987-03-24

Improvement in Sensitivity of Spectrophotometric Method of Antimon-Heteropolymolybdic Acid by Ethyl Alcohol and Its Application to Arsenic Analysis

Sun Ting¹, Wang Bing-wu²

1. Department of Chemistry, Northeast University of Technology, Shenyang;
2. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun

Received:1985-10-08 Online:1987-03-24 Published:1987-03-24

摘要/Abstract

摘要： 本文提出了一个利用乙醇的增敏作用,进行砷锑钼蓝测定痕量砷的高灵敏度的分析方法,对水中砷的检出限可达18ppt。通过对水、植物和钢铁中砷的分析,证明本方法具有较好的实用价值。对有机试剂的增敏作用进行了初步讨论。

Abstract: A sensitive spectrophotometric method for arsenic analysis is described. The higher sensitivity comes from the effect of ethyl alcohol on the reduction reaction of antimon-heteropolymolybdic acid. The sensitivity of this method is 50 times higher than the normal arsenoantimonomolybdate method. The detection limit(based on three times the standard deviation of ten blank measurment) is 18ppt (50ml water sample) and the coefficient of variation is 0.8% and 3.8% at the blank solution and the 0. 3 μg level, respectively.The effect of ethyl alcohol is discussed preliminarily. The reduction reaction of antimon-heteropolymolybdic acid was catalyzed by As(Ⅴ) only when ethyl alcohol or other organic solvents (in water) such as methyl alcohol, isopropanal, dimethylformamide, dioxane and ice acetic acid exists in the arsenoheteropolymo-lybdate solution.

TrendMD:

孙挺, 汪炳武. 乙醇对砷锑钼蓝测砷法的增敏作用研究及其应用. 高等学校化学学报, 1987, 8(3): 221.

Sun Ting, Wang Bing-wu. Improvement in Sensitivity of Spectrophotometric Method of Antimon-Heteropolymolybdic Acid by Ethyl Alcohol and Its Application to Arsenic Analysis. Chem. J. Chinese Universities, 1987, 8(3): 221.