基于分子印迹电聚合膜的双酚A电化学传感器  

Electrochemical Sensor for Bisphenol A Based on Molecular Imprinting Technique and Electropolymerization Membrane

作　　者：张进[1,2] 徐岚[1] 王亚琼[1] 吕瑞红[1] 

机构地区：[1]西南大学化学化工学院,发光与实时分析教育部重点实验室,重庆400715 [2]贵州教育学院化学系,贵阳550003

出　　处：《分析化学》2009年第7期1041-1044,共4页Chinese Journal of Analytical Chemistry

基　　金：重庆市自然科学基金(No.2008BB4263)资助项目

摘　　要：以双酚A为模板分子,邻氨基苯硫酚为单体,采用自组装和电聚合方法,在电极表面制备了对双酚A有选择性的分子印迹聚合物膜。通过循环伏安法研究传感器对双酚A的响应特性。结果表明:在6.0×10-7～5.5×10-5mol/L浓度范围内峰电流值与浓度呈良好线性关系(r=0.991);检出限2.0×10-7mol/L;相对标准偏差<5%(n=9),达到稳定电流所用时间约2min。此传感器具有良好的选择性、重现性及稳定性。通过交流阻抗技术和计时电流法表征了电极表面膜的电化学性质。将传感器初步用于实际样品的分析,获得了较满意的结果。By the approach of self-assembly and electropolymerization, membrane for Bisphenol A （BPA） has been synthesized with bisphenol A as template molecule, o-aminothiophenol as functional monomer. Based on which, an electrochemical sensor was constructed and its response to BPA was evaluated by cyclic vohammetry. The peak current intensity was linear to Bisphenol A in the range of 6.0×10-7^-5.5×10^-5 mol/L with a detection limit of 2.0×10^-7 mol/L and the RSD 〈5% （n =9）. The response time of stable current was about 2 min. The proposed sensor exhibits good selectivity, reproducibility and stability. The AC impedance technology and chronoamperometry were employed to study the electrochemical characteristic of the membrane. The sensor was successfully applied to the determination of BPA in several samples.

关 键 词：分子印迹技术 电聚合膜 双酚A 电流型传感器 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]