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Reference type: Journal
Authors: Xie CG, Li HF, Xie CY, Zhou HK
Article Title: Preparation of Electrochemical Sensor for Salicylic Acid Based on Molecular Imprinted Film.
Publication date: 2009
Journal: Chinese Journal of Analytical Chemistry
Volume: 37
Issue: (7)
Page numbers: 1045-1048.
Alternative URL: http://en.cnki.com.cn/Article_en/CJFDTotal-FXHX200907032.htm

Abstract: Molecular imprinted Film modified glassy carbon electrode was prepared by electrochemical polymerization of pyrrole with the cyclic voltammetry in the presence of template molecular, salicylic acid. The template molecules were removed from the modified electrode surface by over-oxidized at 1.3V in the solution of 0.2 mol/L Na2HPO4 for 10 min. The modified electrodes can effectively promote electrochemical oxidation process of salicylic acid in the surface of electrode and avoid interference of structural similar substance such as benzoic acid. Cyclic voltammetry was employed in the electrochemical measurements. The experimental results show that the optimum acidity of background solution is pH 6.86 and the optimum incubation is 10 min. The linear response curve was obtained from 1.0 x 10(-6) mol/L to 2.0 x 10(-3) mol/L, with the detection limit of 8.0 x 10(-7) mol/L. The imprinted electrode has been applied to the analysis of salicylic acid in the simulated samples with recovery rates ranging from 94.6% to 103.4%
Template and target information: salicylic acid, 2-hydroxybenzoic acid, o-hydroxybenzoic acid
Author keywords: salicylic acid, molecular imprinted polymer, electrochemical polymerization of pyrrole, modified-electrode, sensor

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