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KMID : 1059519930370050477
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Journal of the Korean Chemical Society
1993 Volume.37 No. 5 p.477 ~ p.482
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Determination of Trace Level Mercury in Bio-Materials by Square Wave Anodic Stripping Voltammetry
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Kim Il-Kwang
Park Sung-Woo
Han Jong-Hyun
Kim Youn-Geun
Chun Hyun-Ja
Park Kyung-Ok j
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Abstract
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The determination of trace level mercury in bio-materials has been investigated by the square wave anodic stripping voltammetry (ASV)-technique at glassy carbon electrode. Prior to analysis, the bio-materials were digested with HNO3/H2SO4 mixture and KMnO4 was added to complete the oxidation. The detection limit of the mercury varied greatly with deposition time, deposition potential, pH and stirring rate. When deposition is carried out for 240 sec with 400 rpm stirring at -1.0 volts vs. Ag/AgCl, the detection limit was below 0.5 ppb (2.5 × 10-9 M). The method is recommended for trace level mercury analysis of biomaterials because this procedure is time saving and has higher sensitivity.
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