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|標題:||A sensitive voltammetric method for the determination of parathion insecticide||作者:||Zen, J.M.
|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.
|Appears in Collections:||化學系所|
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