Determination of components of the Cd(II)-Pb(II)-Cu(II) system in aqueous solutions of (polyethylene imine)methylthiourea by stripping voltammetry

被引：3
|
作者：
Osipova, EA
Sladkov, VE
Shkinev, VM
机构：
[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia
[2] Russian Acad Sci, Vernadsky Inst Geochem & Analyt Chem, Moscow 117975, Russia
来源：
JOURNAL OF ANALYTICAL CHEMISTRY | 2000年 / 55卷 / 08期
关键词：
D O I：
10.1007/BF02757912
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Conditions were studied for the stripping voltammetric determination of components of the Cd(II)-Pb(II)-Cu(II) system in aqueous solutions of (polyethylene imine)methylthiourea (PMT), the most efficient polymer complexant for the membrane preconcentration of heavy metal ions. It was shown that PMT significantly enhances the selectivity of determining Pb(II) and Cd(II) in solutions of Cu(II) by stripping voltammetry. Pb(II) and Cd(II)can be determined in the presence of up to 200- and 50-fold amounts of Cu(II), respectively. The limits of detection for Pb(II) and Cd(II) after a 40-s accumulation were 6.9 x 10(-8) and 6.8 x 10(-7) M, respectively.
引用
收藏
页码：759 / 764
页数：6
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