DETERMINATION OF HEAVY-METALS BY THIN-LAYER CHROMATOGRAPHY SQUARE-WAVE ANODIC-STRIPPING VOLTAMMETRY

被引：30
作者：
ALDSTADT, JH [1 ]
DEWALD, HD [1 ]
机构：
[1] OHIO UNIV,DEPT CHEM,CLIPPINGER LABS,ATHENS,OH 45701
来源：
ANALYTICAL CHEMISTRY | 1992年 / 64卷 / 24期
关键词：
D O I：
10.1021/ac00048a015
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A square-wave anodic stripping voltammetric method is described for low parts per million determination of heavy metals separated by thin-layer chromatography (TLC). Heavy metal samples are separated on carboxymethyl cellulose TLC plates and detected by anodic stripping voltammetry (ASV) using a cellulose dialysis membrane-covered mercury film electrode (CM-MFE) placed directly on the TLC plate surface in a thin film of supporting electrolyte solution. The fast scan rates possible in square-wave voltammetry during the stripping step eliminate the need to deoxygenate the sample. Results are presented for a mixture of Pb(II), Cd(II), Cu(II), and Zn(II). Calibration curves for Pb(II) were linear over the range 10-500 ng, with a relative standard deviation of the peak current over a set of eight separate 100-ng Pb(II) samples of 16%.
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页码：3176 / 3179
页数：4
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