Determination of Cyanide Ion by Adsorptive Stripping Voltammetry

흡착벗김 전압전류법에 의한 시안화이온의 정량

  • Cha, Ki-Won (Department of Chemistry, Inha University) ;
  • Ko, Su-Jin (Department of Chemistry, Inha University) ;
  • Kim, Jea-Kyun (Department of Chemistry, Inha University)
  • Received : 2001.10.22
  • Published : 2001.12.25

Abstract

Determination of cyanide ion has been studied by adsorptive stripping voltammetry using hanging mercury electrode. Cyanide ion complexed with copper ion is adsorpbed on the electrode and oxidised at the positive potential scan. Optimal conditions of CN determination were found to be ; supporting electrolyte solution ; 0.1 M NaCl of ammonium buffer at pH 10, accumulation potential; -800 mV vs Ag/AgCl, accumulation time ; 300 s, scan rate ; 50mV/s. The linear concentration of cyanide ion was observed in the range $1{\times}10^{-8}$, $1{\times}10^{-7}M$. The detection limit(n/s=3) was $0.13{\mu}g/L$($5{\times}10^{-9}M$) with 3.5% RSD.

Keywords

cyanide ion;adsorptive stripping voltammetry;$Cu^{2+}$

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