对羟基苯甲酸电化学传感器的制备及应用  

Preparation and application of an electrochemical sensor for determination of p-hydroxybenzoic acid

作　　者：薛万清 董雁[1] 张夏红[1] 赵萍萍 XUE Wan-qing;DONG Yan;ZHANG Xia-hong;ZHAO Ping-ping(College of Chemistry and Materials Science,Longyan University,Longyan 364012,China)

机构地区：[1]龙岩学院化学与材料学院,福建龙岩364012

出　　处：《化学研究与应用》2024年第7期1458-1465,共8页Chemical Research and Application

基　　金：福建省中青年教师教育科研项目(JAT210436)资助;新罗区奇迈科技创新基金项目(XLQM002)资助。

摘　　要：在玻碳电极表面修饰石墨烯,以对羟基苯甲酸为印迹分子,邻苯二胺为功能单体,通过电聚合,构建对羟基苯甲酸电化学传感器,通过循环伏安法(CV)和方波伏安法(SWV)法研究其性能,优化了聚合模板分子与功能单体的摩尔比、洗脱液种类、富集时间及洗脱时间。结果表明,分子印迹传感器的峰电流与对羟基苯甲酸溶液浓度在1.00×10^(-9)~1.00×10^(-2)mol·L^(-1)范围的内负对数呈良好的线性关系,相关系数为0.9956,检出限为2.013×10^(-10)mol·L^(-1)(S/N=3),回收率在98.7%~106%,相对标准偏差在2.5%~3.5%之间。制备的分子印迹电化学传感器可以用作复杂样品的检测,能满足快速现场检测的要求。Molecularly imprinted electrochemical sensors were synthesized on graphene modified glassy carbon electrode with p-Hydroxybenzoic acid as template molecule and o-phenylenediamine as functional monomers.The imprint membrane could be prepared by optimizing synthesis conditions and a quick method for the test p-Hydroxybenzoic acid was constructed.The electrochemical behavior of the electrochemical sensor was studied in detail using square wave voltammetry(SWV),cyclic voltammetry(CV).The results indicated that imprint membrane had reorganization of p-Hydroxybenzoic acid.The sensor had a linear relationship between SWV peak current and logarithm of cinnamic acid concentration in the range from 1.00×10^(-9)~1.00×10^(-2)mol·L^(-1)and the linear equation was I=-15.50 IgC-14.35(R^(2)=0.9956),the detection limit was 2.013×10^(-10)mol·L^(-1)(S/N=3),the standard addition recovery of p-Hydroxybenzoic acid were among 98.7%to 105.5%,and relative standard deviation were 2.5%~3.5%.The electrochemical sensor could be used to rapid detect p-Hydroxybenzoic acid in complex mixture.

关 键 词：对羟基苯甲酸 分子印迹聚合物 电化学传感器 循环伏安法(CV) 

分 类 号：O657.1[理学—分析化学]