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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 32, Number 2
JKCSEZ 32(2)
April 20, 1988 

Increased Sensitivity in Cyanide Measurement by Differential-Pulse Cathodic Stripping Voltammetry

시차펄스 음극벗김 전압전류법에 의한 시안이온 측정의 감도향상
Moon Son Na, Young Soon Kwon, Myung-Zoon Czae

나문선, 권영순, 채명준
수은방울전극에서 바로 시안이온을 시차펄스음극벗김 전압전류 법으로 측정한 결과 검출한계를 낮출수가 있었다. 가장 알맞는 실험조건은 다음과 같다. : 0.1M KCl-0.01M 인산염 지지전해질, pH 7, 석출전위 0.00V, 그리고 석출시간 3분이었다. 이 조건에서 검출한계는 3 × 10-7M (8ppb) CN-이다.

Direct differential-pulse cathodic stripping voltammetry on mercury electrode (HMDE) provides a sensitive technique for low level cyanide measurement in distilled and sulfide free solution. Cyclic voltammetry revealed the forming and redissolution reactions were reversible at pH 7 in 0.1M KCl-0.01M phosphate supporting electrolyte. The analytical conditions have been optimized. With deposition time of 3 min at deposition potential 0.00V(vs. Ag/AgCl) in this medium of pH 7, quite reproducible and linear calibration curve was obtained down to 3 × 10-7M (8ppb) CN- which was the detection limit.

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