3D石墨烯修饰的猛杀威分子印迹电化学传感器的制备  

Preparation of Promecarb Electrochemical Sensor Based on 3D-Graphene and Molecularly Imprinted Polymer

作　　者：陈晓[1] 谭学才[1] 严军[1] 吴叶宇 李晓宇[1] 张慧[1] 陈全友[1] 冯德芬[1] 金应鑫 CHEN Xiao TAN Xue-Cai YAN Jun Wu Ye-Yu LI Xiao-Yu ZHANG Hui CHEN Quan-You FENG De-Fen JIN Ying-Xin(School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Key Laboratory of Guangxi Colleges and Universities for Food Safety and Pharmaceutical Analytical Chemistry, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Nanning 530008, Chin)

机构地区：[1]广西民族大学化学化工学院,广西高校食品安全与药物分析化学重点实验室,广西林产化学与工程重点实验室,南宁530006

出　　处：《分析化学》2016年第12期1834-1839,共6页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(Nos.21365004,21065001);广西自然科学基金重点项目(No.2013GXNSFDA019006);广西教育厅科研基金重点项目(No.2013ZD019);广西高等学校高水平创新团队及卓越学者资助计划(桂教人[2014]7号)资助~~

摘　　要：以猛杀威为模板分子、丙烯酰胺（AM）为功能单体、马来松香丙烯酸乙二醇酯（EGMRA）为交联剂、自制的3D石墨烯（3D-rGO）为增敏材料,在玻碳电极表面合成分子印迹聚合物,制备检测猛杀威的分子印迹电化学传感器。运用扫描电镜（SEM）对自制3D石墨烯的形貌进行了表征,通过循环伏安法（CV）、差分脉冲伏安法（DPV）和交流阻抗法（EIS）对猛杀威传感器的性能进行了研究。结果表明,猛杀威的浓度在8.0×10^-8~8.0×10^-6mol/L范围内与响应电流值呈良好的线性关系,线性相关系数R=0.9954,检出限为7.3×10^-8mol/L（S/N=3）,猛杀威分子印迹敏感膜的印迹因子β=3.88,且相对于3种结构类似物的选择因子α〉〉1,说明此传感器具有良好的选择性。将此传感器应用于生菜样品检测,加标回收率在96.7%~98.7%之间。A sensitive electrochemical sensor for promecarb was prepared based on molecularly imprinted strategy by thermal polymerization. The molecularly imprinted polymers （ MIP ） were synthesized by using promecarb as template molecule, acrylamide （ AM） as functional monomer, ethylene glycol acrylate, maleic rosin ester （EGMRA） as a cross-linking, homemaking 3D graphene as sensitizing materials to modify glassy carbon electrode surface, and synthesize the promecarb molecular imprinting electrochemical sensor. 3D graphene was characterized by scanning electron microscopy （ SEM） . The properties of the sensor were tested via cyclic voltammetry （ CV ） , differential pulse voltammetry （ DPV ） and electrochemical impedance spectroscopy （ EIS ） . The results showed that promecarb concentration in the range of 8.0 ×10^-8 -8. 0×10^-6 mol/L had a good linear relationship （linear correlation coefficient R=0. 9954） with current, and the detection limit was 7 . 3×10^-8 mol/L （ S/N=3 ） . The imprinted factorβof promecarb molecularly imprinted sensitive film was 3. 88, the selection factorαwas far greater than 1 compared to the three structural analogs. The imprinted sensor was successfully used to determine promecarb in lettuce samples with recoveries ranging from 96. 7% to 98. 7% by using standard addition method.

关 键 词：猛杀威 三维石墨烯 分子印迹电化学传感器 

分 类 号：TQ127.11[化学工程—无机化工] O657.1[理学—分析化学]