Spectroelectrochemical sensing based on attenuated total internal reflectance stripping voltammetry. 1. Determination of lead and cadmium

被引:26
作者
Shtoyko, T
Maghasi, AT
Richardson, JN
Seliskar, CJ
Heineman, WR
机构
[1] Univ Cincinnati, Dept Chem, Cincinnati, OH 45221 USA
[2] Shippensburg Univ, Dept Chem, Shippensburg, PA 17257 USA
关键词
D O I
10.1021/ac034281f
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The electrodeposition and subsequent stripping of lead and cadmium on an indium tin oxide (ITO) optically transparent electrode (OTE) were monitored by attenuated total internal reflectance. Light passing through the ITO-OTE is attenuated proportionally to the concentration of metal ion and deposition time. The wavelength dependence of the optical responses of deposited Pb and Cd was determined; optimal performance based on maximum sensor absorbance was at 750 nm for Pb and at 400 nm for Cd. Calibration curves were obtained over a range of 5 x 10(-8) to 5 x 10(-5) M and 1 x 10(-9) to 1 x 10(-5) M for Pb and Cd, respectively, using change in absorbance that accompanied deposition and subsequent stripping of the electrodeposited metal from the ITO.
引用
收藏
页码:4585 / 4590
页数:6
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