DETERMINATION OF ARSENIC BY CATHODIC STRIPPING VOLTAMMETRY AT A HANGING MERCURY DROP ELECTRODE

被引:31
作者
KOTOUCEK, M [1 ]
VASICOVA, J [1 ]
RUZICKA, J [1 ]
机构
[1] AGR REG LAB, CS-79812 KRALICKY HAJ, CZECHOSLOVAKIA
关键词
VOLTAMMETRY; ARSENIC;
D O I
10.1007/BF01240167
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Arsenic (III), respectively arsenic(V) after the reduction were determined in model solutions and some inorganic and organic materials by fast scan differential pulse cathodic stripping voltammetry and by direct current cathodic stripping voltammetry with a rapid increase of potential. The accumulation on a hanging mercury drop electrode followed by cathodic stripping was carried out in 0.7-0.8 M HCl or 1-2 M H2SO4 solutions containing Cu(II)-ions. Detection limits calculated from regression parameters was determined to be under 1 ng/ml for the samples containing very low arsenic concentrations. The relative standard deviation did not reach 8% for arsenic contents about of 5 ng/ml.
引用
收藏
页码:55 / 62
页数:8
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