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Bismuth Coated Carbon Fiber Microelectrode with Gallic Acid n-Propyl Ester for Trace Copper Analysis

비스무스코팅 탄소섬유전극과 갤릭산 착물을 사용한 구리 이온의 흔적량 분석

  • Ly, Suw-Young (Biosensor Research Institute, Seoul National University of Technology) ;
  • Lee, Chang-Hyun (Division of General Education, Pyeongtaek University) ;
  • Jung, Young-Sam (Department of Chemistry Korea University)
  • Published : 2007.10.31

Abstract

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 $0.03-25.9\;{\mu}gl^{-1}$ and $0-25\'mgl^{-1}$ Cu(II) were obtained. The relative standard deviation at $13\;mgl^{-1}$ Cu was 0.9% (n = 12) in optimum conditions. The detection limit was found to have been $0.019\;{\mu}gl^{-1}$, with a 30-sec accumulation time. The developed methods were applied to a copper assay in water samples.

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