【摘 要】
：
The presence of the pesticide ethion was determined using an electroanalytical method, i. e. , linear sweep stripping voltammetry at a hanging mercury drop elec
【机 构】
：
Department of Chemistry,The Key Laboratory,School of Physical and Chemical Sciences
【基金项目】
：
国家自然科学基金;the Program for Changjiang Scholars and Innovative Research Team in Universities;the State Key Laboratory of Electroanalytical Chemistry of Changchun Applied Chemistry Institute;State Key Lab
论文部分内容阅读
The presence of the pesticide ethion was determined using an electroanalytical method, i. e. , linear sweep stripping voltammetry at a hanging mercury drop electrode in the Britton-Robbinson buffer with pH = 8. 36, based on its reduction peak observed at - 690 mV following its alkaline hydrolysis. The experimental parameters, namely, the preconcentration potential, the preconcentration time, and the scan rate were investigated and -300 mV (vs. Ag/AgCl), 270 s, and 100 mV/s were selected as the optimal values, respectively. The linear relationship between the peak current and the concentration was found to be in the range of 0. 02-0. 16 mg/L, with a detection limit of 0.0087 mg/L. The proposed method was applied to the determination of ethion in spiked vegetable and fruit samples via a preextraction with anhydrous ethanol.
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