Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/33980
標題: A sensitive voltammetric method for the determination of parathion insecticide
作者: Zen, J.M.
曾志明
Jou, J.J.
Kumar, A.S.
關鍵字: parathion;insecticide;Nafion((R));glassy carbon electrode;square-wave voltammetry;pesticides
Project: Analytica Chimica Acta
期刊/報告no:: Analytica Chimica Acta, Volume 396, Issue 1, Page(s) 39-44.
摘要: 
A sensitive voltammetric method is developed for the determination of parathion (phi NO2) using a Nafion(R)-coated glassy carbon electrode. In this method, parathion is first irreversibly reduced from phi NO2 to phi NHOH. The reversible peaks at around +0.33 V (versus Ag/AgCl) corresponding to a two-electron oxidation/reduction of hydroxylamine (phi NHOH) to the nitroso (phi NO) derivative were used for detection with square-wave voltammetry. The experimental parameters, such as, pH, film thickness, preconcentration potential, preconcentration time, and square-wave voltammetric parameters were optimized. Using this method, a linear calibration curve for parathion was obtained up to 15 mu M range in pH 1.1 citrate buffer solution with a detection limit (S/N = 3) of 50 nM. (C) 1999 Elsevier Science B.V. All rights reserved.
URI: http://hdl.handle.net/11455/33980
ISSN: 0003-2670
DOI: 10.1016/s0003-2670(99)00357-8
Appears in Collections:化學系所

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