毒莠定印迹邻氨基苯硫酚/金纳米粒子复合膜安培传感器  

An amperometric sensor for picloram based on its imprinting in composite membrane of o-aminothiophenol and Au nanoparticles

作　　者：张进 雷建平 鞠熀先[1,2] 王超英 牛延慧[3] 

机构地区：[1]生命分析化学国家重点实验室 [2]南京大学化学化工学院,南京210093 [3]贵州师范学院化学与生命科学学院,贵阳550018

出　　处：《中国科学：化学》2013年第5期585-591,共7页SCIENTIA SINICA Chimica

基　　金：贵州省科学技术基金(J20102120);国家自然科学基金(21121091;21135002);贵州省重点支持学科建设基金(2011231)资助

摘　　要：在模板分子存在下,在金电极上自组装邻氨基苯硫酚（oATP）,通过电聚合制得毒莠定印迹的oATP/金纳米粒子聚合薄膜及其安培传感器.采用循环伏安法和交流阻抗技术对传感器制备过程进行表征,用紫外光谱法研究了单体与模板间的相互作用.以K3Fe（CN）6为探针,示差脉冲伏安曲线的峰电流与毒莠定浓度在2.0×10^-7-2.4×10 4mol/L范围内呈现良好的线性关系（r=0.9963）,毒莠定的检出限为6.5×10 8mol/L（S/N=3）.将该印迹膜传感器用于环境水样加标回收检测,结果令人满意.A novel amperometric sensor based on picloram imprinted polymer membrane was fabricated on gold electrode for the detection of picloram by self-assembly of o-aminothiophenol （oATP） and electropolymerization of oATP/Au nanoparticles in the presence of template molecule. The modification procedure was characterized via cyclic voltammetry and electrochemical impedance spectroscopy. The interaction between oATP and picloram was confirmed by ultraviolet spectroscopy. In the presence of K3Fe（CN）6 as redox probe, the peak current of differential pulse voltammmogram decreased linearly with the increasing concentration of picloram from 2.0×10^-7 to 2.4×104 mol/L （r = 0.9963）. The detection limit was 6.5×10^-8 mol/L （S/N=3）. Acceptable results for the recovery of standard addition of picloram in environmental water samples were obtained using the proposed imprinted sensor.

关 键 词：分子印迹 金纳米粒子复合物 邻氨基苯硫酚 毒莠定 安培传感器 

分 类 号：X832[环境科学与工程—环境工程] TP212.2[自动化与计算机技术—检测技术与自动化装置]