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International Journal of Electrochemistry
Volume 2011, Article ID 986494, 6 pages
http://dx.doi.org/10.4061/2011/986494
Research Article

Electrochemical Sensor for Determination of Parathion Based on Electropolymerization Poly(Safranine) Film Electrode

Department of Chemistry, Teachers' College of Simao, Puer, Yunnan 665000, China

Received 25 February 2011; Accepted 29 March 2011

Academic Editor: Aleksandar Radu

Copyright © 2011 Xingyuan Liu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Parathion has been determined with voltammetric technique based on a novel sensor fabricated by electropolymerization of safranine on a glassy carbon electrode (GCE). The electrochemical behavior of poly(safranine) film electrode and its electrocatalytic activity toward parathion were studied in detail by cyclic voltammetry (CV) and linear sweep voltammetry (LSV). All experimental parameters were optimized, and LSV was proposed for its determination. In optimal working conditions, the reduction current of parathion at this poly(safranine)-modified electrode exhibited a good linear relationship with parathion concentration in the range of 3.43×108 to 3.43×105 mol L1. The detection limit was 1.0×108 mol L1. The high sensitivity and selectivity of the sensor were demonstrated by its practical application for the determination of trace amounts of parathion in fruit samples.