分子印迹电化学传感器检测环境中特丁津研究  

A Molecularly Imprinted Polymers Electrochemical Sensor for Determination of Terbuthylazine in Environmental Samples

作　　者：张进[1,2] 熊和琴 姚桃花[2] 罗荣琴[1] 李世杰[1] 

机构地区：[1]中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳550002 [2]贵州师范学院化学与生命科学学院,贵州贵阳550018

出　　处：《环境科学与技术》2014年第5期31-35,共5页Environmental Science & Technology

基　　金：贵州省科学技术基金项目资助(J20102120);贵州省特色重点学科建设项目(2012442);贵州省自然科学招标项目(2012052)

摘　　要：除草剂在水体、土壤、大气等环境介质中的残留广受关注。在弱酸条件下，于铂电极表面电化学聚合邻氨基苯酚（oAP）制备了除草剂特丁津（TB）分子印迹电化学传感器（MIECS）。以K3Fe（CN）。为电化学探针，利用循环伏安法和交流阻抗技术研究了MIECS的识别性能。结果表明：K3Fe（CN）6的峰电流值与TB浓度在2～160μmol／L范围内呈现较好的线性关系（R^2=0．9915），检出限为0．66μmol／L。MIECS达到稳定电流响应时间约为8min，对TB具有较好的选择性和稳定性。将该印迹膜传感器用于农田环境水样的检测分析，回收率在97．6％～102．2％。Pollution of herbicide residues in water, soil and atmosphere has drawn common concern. This paper described an electrochemical sensor of molecularly imprinted polymers membrane （MIECS） for detecting herbicide terbuthylazine （TB）, which was prepared by the method of electropolymerization with o-aminophenol （oAP） onto a platinum electrode. For performance recognition of the MIECS, the investigation was conducted by a K3Fe（CN）6 probe which was based on the techniques of cyclic voltammetry （CV） and electrochemical impedance spectroscopy （EIS）. The results showed that the peak current of K3Fe（CN）,, decreased linearly in a range from 2 to 160 μmol/L （R^2=0.991 5） of TB concentration with a detection limit of 0.66 μmol/L; and the response time was approximately 8 min. In addition, the MIECS showed high selectivity and long-term stability, e.g. a successful application of MIECS to measuring TB concentrations of water samples from farmland showed that the recoveries were within the range from 97.6% to 102.2%.

关 键 词：分子印迹技术 电化学传感器 电聚合膜 除草剂特丁津 

分 类 号：X132[环境科学与工程—环境科学]