摘要
以氧乐果为模板分子,邻苯二胺为功能单体,在碳纳米管修饰的玻碳电极表面通过电聚合方法制成氧乐果分子印迹聚合物膜,用无水乙醇洗脱后制备出对氧乐果有特异响应的电化学传感器。通过循环伏安法和电化学阻抗法对分子印迹传感器的电化学性能进行表征。以K_3Fe(CN)_6为探针,采用差分脉冲伏安法研究了该分子印迹传感器的分析性能,建立了氧乐果的间接测定方法。结果表明,K_3Fe(CN)_6的相对峰电流与氧乐果浓度在1.0×10^(-7)~2.0×10^(-6)mol/L范围内呈良好的线性关系,检出限为3.6×10^(-8)mol/L。
An electrochemical sensor for omethoate detection based on electropolymerized molecularly imprinted polymers（MIPs） was fabricated.The sensitive layer was prepared by electropolymerizing o-phenylenediamine（OPD） on a glassy carbon electrode modified with multi-walled carbon nanotube in the presence of template（omethoate） which could be removed by ethanol.The electrochemical properties of the molecularly imprinted sensor were characterized by cyclic voltammetry and electrochemical impedance spectroscopy（EIS）.The analytical characteristics of the sensor was investigated by differential pulse voltammetry, and an indirect analytical method based on the medium of K3Fe（CN）6 was established.The result showed that a linear relationship between concentration of omethoate and relative peak current change of K3Fe（CN）6 was obtained in the range of 1.0×10-7-2.0×10-6 mol/L, and the detection limit was 3.6×10-8 mol/L.
出处
《分析测试学报》
CAS
CSCD
北大核心
2016年第9期1176-1180,共5页
Journal of Instrumental Analysis
基金
广西自然科学基金项目(2013GXNSFAA019045)
关键词
分子印迹
氧乐果
多壁碳纳米管
传感器
molecular imprinting
omethoate
multi-walled carbon nanotube
sensor
