Amperometric determination of hydrogen peroxide with a manganese dioxide-modified carbon paste electrode using flow injection analysis

被引：109
|
作者：
Schachl, K
Alemu, H
Kalcher, K
Jezkova, J
Svancara, I
Vytras, K
机构：
[1] KARL FRANZENS UNIV GRAZ,INST ANALYT CHEM,A-8010 GRAZ,AUSTRIA
[2] UNIV ADDIS ABABA,DEPT CHEM,ADDIS ABABA,ETHIOPIA
[3] UNIV PARDUBICE,DEPT ANALYT CHEM,CZ-53210 PARDUBICE,CZECH REPUBLIC
来源：
ANALYST | 1997年 / 122卷 / 09期
关键词：
manganese dioxide; hydrogen peroxide; flow injection analysis; amperometry; modified carbon paste electrode;
D O I：
10.1039/a701723e
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A carbon paste electrode bulk modified with MnO2 was investigated as an amperometric detector for hydrogen peroxide in flow injection analysis (FIA). With an operating potential of +0.46 V versus Ag/AgCl, H2O2 produces catalytic oxidation currents which can be exploited for quantitative determinations. Factors influencing the analytical performance of the electrode, such as paste composition and pH, were studied both for batch voltammetry and for FIA. For the flow system the influence of the injection volume and flow rate were examined. The amperometric signals are linearly proportional to H2O2 concentrations in the range 0.5-350 mg l(-1), showing a detection limit (three times the signal-to-noise ratio) of 45 mu g l(-1).
引用
收藏
页码：985 / 989
页数：5
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