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http://dx.doi.org/10.4491/KSEE.2011.33.2.137

Evaluation of Field Application and Optimum Operational Condition for Heavy Metals Analysis Using Environment-Friendly Bismuth Film Electrode  

Kim, So-Youn (R&D Center, KORBI Co. Ltd.)
Yang, Yong-Woon (Department of Fire & Environmental Safety, Keimyung College University)
Jeon, Sook-Lye (R&D Center, KORBI Co. Ltd.)
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Abstract
This study was conducted to establish the optimal electrolyte and bismuth concentrations using bismuth film electrode in laboratory and to confirm the possibilities of using this operational condition for heavy metals monitoring in field. In lab test, heavy metal measurement was not accurate more than 600 ppb when heavy metal (Pb, Cd, Zn) range 100~1,000 ppb was measured with bismuth 2,000 ppb. So, bismuth and heavy metal was reacted about 1:1 with ASV method. In electrolyte test, 0.1 M acetate buffer (pH 4.5), 0.1 M chloroacetate buffer (pH 2.0), 0.1 M HCl (pH 2.0), 0.1 M $HNO_3$ (pH 2.0) was tested. As a results, 0.1 M acetate buffer was most suitable in ASV measurement with bismuth film electrode. In field application, Pb, Cd and Zn was measured respectively 36~45 ppb, 84~91 ppb, 90~98 ppb when heavy metal (Pb, Cd, Zn) 100 ppb was spiked in field sample. These results were identified of matrix effect in field sample, So relationship between heavy metal measurement and matrix effects will be studied.
Keywords
Heavy Metal; Electrolyte; Anodic Stripping Voltammetry; Bismuth Film Electrode;
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