Determination of Cyromazine Residue by Molecularly Imprinted Electrochemical Sensor
摘 要
以邻苯二胺为功能单体,赛诺吗嗪为印迹分子,采用电化学聚合法在石墨烯修饰的金电极上制备了可快速测定赛诺吗嗪的分子印迹电化学传感器。考察了功能单体的选择、石墨烯修饰金电极、扫描圈数等参数对该传感器性能的影响,利用循环伏安法、差分脉冲伏安法和电化学阻抗法对该传感器进行表征。赛诺吗嗪的线性范围为6.0×10-9~6.0×10-4mol·L-1,检出限(3s/k)为1.0×10-9mol·L-1。加标回收率在88.0%~102%之间,测定值的相对标准偏差(n=5)在2.0%~3.5%之间。
Abstract
A molecularly imprinted electrochemical sensor for fast determination of cyromazine was prepared by electropolymerization on the graphene-modified gold electrode, with o-phenylenediamine as the functional monomer and cyromazine as the imprinted molecular template. Several parameters controlling the performance of the molecularly imprinted electrochemical sensor were investigated in detail, such as the choice of functional monomer, the modification of gold electrode by graphene and the scan cycles, et al. Then the sensor was characterized by cyclic voltammetry, differential pulse voltammetry and electrochemical impedance method. The linear range of cyromazine was 6.0×10-9-6.0×10-4mol·L-1, with detection limit (3s/k) of 1.0×10-9mol·L-1. Recovery rates obtained by standard addition method were in the range of 88.0%-102%, and RSDs (n=5) were in the range of 2.0%-3.5%.
中图分类号 O657.1 DOI 10.11973/lhjy-hx201706011
所属栏目 工作简报
基金项目 国家自然科学基金面上项目(81373047)
收稿日期 2016/5/29
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备注周强(1989-),男,山东枣庄人,硕士研究生,研究方向为分子印迹电化学传感器
引用该论文: ZHOU Qiang,PAN Deng,GAO Mucong,CHANG Dong,ZHANG Ze,PAN Hongzhi. Determination of Cyromazine Residue by Molecularly Imprinted Electrochemical Sensor[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2017, 53(6): 674~678
周强,潘登,高牧丛,常东,张泽,潘洪志. 分子印迹电化学传感器测定赛诺吗嗪残留[J]. 理化检验-化学分册, 2017, 53(6): 674~678
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【8】刘新艳,潘灿平,刘肃.蔬菜中灭蝇胺残留的强阳离子交换固相萃取柱净化-液相色谱分析[J].农药学学报, 2008,10(2):166-171.
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【12】GEIM A K, NOVOSELOV K S. The rise of graphene[J]. Nature Mater, 2007,6(3):183-191.
【13】张敏,孟煜阳,柳鹏,等.基于铁氰化钐修饰的玻碳电极研究鸟嘌呤和腺嘌呤的电化学行为及其含量的测定[J].理化检验-化学分册, 2015,51(7):902-906.
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