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KMID : 1024520070160101111
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Journal of the Environmental Sciences
2007 Volume.16 No. 10 p.1111 ~ p.1118
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Bismuth Coated Carbon Fiber Microelectrode with Gallic Acid n-Propyl Ester for Trace Copper Analysis
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Ly Suw-Young
Lee Chang-Hyun
Jung Young-Sam
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Abstract
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A bismuth-coated carbon fiber microelectrode was prepared using cyclic voltammetry (CV). An analytical application was performed for the copper analysis with Square Wave Stripping Voltammetry (SWSV). Gallic acid n-propyl ester (PG) was used for the complex formation with a copper ion, and electrochemical measurements were performed with a pre-amplifier of a low-current module for nano am per detection. The effects of various parameters on the response were optimized. Analytical working ranges of and Cu(II) were obtained. The relative standard deviation at Cu was 0.9% (n = 12) in optimum conditions. The detection limit was found to have been , with a 30-sec accumulation time. The developed methods were applied to a copper assay in water samples.
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KEYWORD
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Stripping voltammetry, Bismuth coating, Carbon fiber microelectrode, Gallic acid n-propyl ester
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