分析测试学报2011，Vol.30Issue(1)：18-23,6.DOI:10.3969/j.issn.1004-4957.2011.01.004
聚吡咯/碳纳米管分子印迹修饰电极对槲皮素的选择性测定
Molecularly Imprinted Polymer Incorporated Carbon Nanotube Modified Electrode for Selective Determination of Quercetin
摘要
Abstract
A molecularly imprinted polymer membrane modified electrode (PPy/CNT/GCEMIp) was developed via the electrochemical polymerization of pyrrole in the presence of carbon nanotube and the molecular template quercetin(Qu). The electrochemical performance of PPy/CNT/GCEMIp was studied by electrochemical impedance spectroscopy(EIS). The electrochemical behaviors of Qu were investigated with cyclic voltammetry(CV) and differential pulse voltammetry (DPV) at the PPy/CNT/GCEMIp. The results showed that a sensitive oxidation peak was observed at O. 184 V in pH 7.0 PBS and the peak current was improved obviously, indicating that PPy/CNT/GCEMIP exhibited good electrocatalytic activity and enrichment towards Qu. Meanwhile, the PPy/CNT/GCEMIP displayed a high selectivity in voltammetric measurements of Qu in the presence of morin with an anodic peak separation value of 263 mV by DPV. Under the optimal conditions, the oxidation peak current of Qu at the modified electrode was linear with the concentration over the range of 1.0 × 10-7 _ 1.0 × 10-3 mol/L with a detection limit or5. 5 × 10-8 mol/L. The relative standard deviation( RSD, n ＝5) for 1.0 ×10-4 mol/L Qu was 0. 2％ . With good stability, high selectivity, and wide linear range for the determination of Qu, PPy/CNT/GCEMIP could be applied in the determination of tablets containing Qu.关键词
碳纳米管/分子印迹聚合物/槲皮素/桑色素/选择性Key words
carbon nanotube/ molecularly imprinted polymer/ quercetin/ morin/ selectivity分类
化学化工引用本文复制引用
朱玲艳,王宗花,陈小印,张菲菲,夏延致,李延辉..聚吡咯/碳纳米管分子印迹修饰电极对槲皮素的选择性测定[J].分析测试学报,2011,30(1):18-23,6.基金项目
国家自然科学基金资助项目(20975056,50802045) （20975056,50802045）
青岛市科技计划基础研究项目(091330jch) （091330jch）
山东省泰山学者资助项目(TS20070711) （TS20070711）
