基于石墨烯掺杂金纳米粒子的速灭威分子印迹电化学传感器  

Molecularly imprinted electrochemical sensor based on a graphene doping gold nanoparticles modified electrode for the determination of metolcarb

作　　者：胡琪[1] 谭学才[1] 吴佳雯[1] 李晓宇[1] 余会成[1] 李小燕[1] 雷福厚 黄在银[1] 

机构地区：[1]广西民族大学化学化工学院广西林产化学与工程重点实验室广西高校食品安全与药物分析化学重点实验室,南宁530008

出　　处：《分析试验室》2015年第3期249-254,共6页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(21365004,21065001,21165003);广西自然科学重点基金(2013GXNSFDA019006);广西教育厅重点科研基金(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);广西民族大学研究生教育创新计划项目(GXUN-chx2013092)资助

摘　　要：以速灭威（MTMC）为模板分子,甲基丙烯酸（MAA）为功能单体,马来松香丙烯酸乙二醇酯（EGMRA）为交联剂,在石墨烯掺杂金纳米粒子修饰玻碳电极表面合成分子印迹膜,研制了测定MTMC的分子印迹电化学传感器。采用扫描电镜（SEM）对传感膜的形貌进行了表征,通过循环伏安法（CV）、电化学阻抗谱法（EIS）和差示脉冲伏安法（DPV）对传感器的性能进行了研究。DPV测试表明,MTMC的浓度在1.0×10-7~1.0×10-4mol/L范围内呈现良好的线性关系（线性相关系数为R=0.9936）,检出限2.9×10-8mol/L（S/N=3）。传感器应用于蔬菜样品的加标回收检测,回收率在93.4%~106.4%之间。A new molecular imprinted electrochemical sensor has been developed for detection of metolcarb（ MTMC） by combination of graphene and gold nanoparticles. The molecularly imprinted polymer（ MIP） was synthesized on the grapheme and gold nanoparticles modified glassy carbon electrode surface by using MTMC as a template molecule,methyl acrylic acid as a functional monomer,and ethylene glycol maleic rosinate acrylate（ EGMRA） as a cross-linker. The morphology of the sensing membrane was characterized by scanning electron microscope（ SEM）. The performance of the sensor was investigated by cyclic voltammetry（ CV）,differential pulse voltammetry（ DPV） and electrochemical impedance spectroscopy（ EIS）. A linear relationship between oxidation peak current of the probe and concentration of MTMC was obtained over a range from 1. 0 × 10-7to1. 0 × 10-4mol / L（ linear correlation coefficient = 0. 9936） with a detection limit（ S / N = 3） of 2. 9 ×10-8mol / L. The imprinted sensor was successfully used to determine MTMC in vegetable samples with recoveries ranging from 93. 4% to 106. 4%.

关 键 词：速灭威 石墨烯掺杂金纳米粒子 分子印迹电化学传感器 马来松香丙烯酸乙二醇酯 

分 类 号：O657.1[理学—分析化学]