分析化学2011，Vol.39Issue(4)：528-533,6.DOI:10.3724/SP.J.1096.2011.00528
聚谷氨酸修饰电极同时检测对苯二酚和邻苯二酚
Simultaneous Determination of Hydroquinone and Catechoi with Poly(glutamic acid) Modified Electrode
摘要
Abstract
Glassy carbon electrode was modified with poly(glutamic acid) films by electrochemical polymerization of glutamic acid monomer. Poly(glutamic acid) films showed good adherence to the electrode surface. The effects of various experimental conditions such as polymerization potential,circles and scan rate were studied as for the electrochemical polymerization process. The performance of modified electrode was characterized by cyclic voltammetry (CV). Poly(glutamic acid) modified electrode showed an excellent electrocatalytic ability towards the redox of hydroquinone and catechol with a decrease of the overpotential and the improvement of the redox peak current. In 0.1 mol/L PBS (pH 7. 0), hydroquinone and catechol could be simultaneously determined on the modified electrode by CV and differential pulse votammetry (DPV) techniques. The DPV response of two compounds increased linearly with the concentration in the range of 5.0 × 10-6 - 1.0 × 10-4 mol/L,and the detection limits (S/N=3) were 1. O× 10-6 mol/L. Moreover, the modified electrode exhibited good repeatability and long-time stability. It was successfully used to determine hydroquinone and catechol in waste water samples with recoveries between 99.6 ％ and 103.3 ％ and the relative standard derivations (RSD) between 1.2％ and 2.3％.关键词
化学修饰电极/聚谷氨酸/电催化/对苯二酚/邻苯二酚Key words
Chemically modified electrode/ Poly(glutamic acid)/ Electrocatalysis/ Hydroquinone/Catechol引用本文复制引用
王春燕,由天艳,田坚..聚谷氨酸修饰电极同时检测对苯二酚和邻苯二酚[J].分析化学,2011,39(4):528-533,6.基金项目
本文系国家自然科学基金(No.20875085)资助项目 （No.20875085）
