导电分子印迹膜化学修饰电极的制备及其对胭脂红的电化学检测  

Preparation of conductive molecularly imprinted membrane chemically modified electrode and electrochemical detection of Ponceau 4R

作　　者：姜涛 邱海燕 王肖元 盛程曦 居家奇 JIANG Tao;QIU Haiyan;WANG Xiaoyuan;SHENG Chengxi;JU Jiaqi(School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai 201418,China;School of Sciences,Shanghai Institute of Technology,Shanghai 201418,China)

机构地区：[1]上海应用技术大学化学与环境工程学院,上海201418 [2]上海应用技术大学理学院,上海201418

出　　处：《复合材料学报》2021年第10期3200-3208,共9页Acta Materiae Compositae Sinica

基　　金：安徽省博士后基金(2019B345);安徽省自然科学基金(1908085QE244);中国科学院光伏与节能材料重点实验室(PECL2018KF010);大学生高性能复合材料创客实验室(2016ckjh069)。

摘　　要：报道了一种聚丙烯酰胺(PAAM)-植酸(PA)-聚多巴胺(PDA)导电分子印迹膜(PAAM-PA-PDA MIP)化学修饰电极的制备、表征及其在电化学定量检测食品添加剂胭脂红(P4R)中的应用。即通过原位电聚合和碱液洗脱的方法在玻碳电极(GCE)表面制得具有分子识别作用的导电分子印迹膜(PAAM-PA-PDA MIP)化学修饰电极,并利用SEM、循环伏安法(CV)及交流阻抗法(EIS)对该导电分子印迹膜化学修饰电极的表面形貌和电化学性能进行表征。研究结果表明该方法所制备的导电分子印迹膜化学修饰电极具有良好的电化学检测性能和应用前景,其对P4R的线性检测区间为10~200μmol/L,灵敏度为0.085 A/mol/L,检测限可达23.6 nmol/L,并可有效地应用于P4R实际样品的分析检测。A polyacrylamide-phytic acid-polydopamine conductive molecularly imprinted membrane(PAAM-PAPDA MIP) chemically modified electrode was prepared, characterized and applied to the quantitative detection of food additive Ponceau 4 R(P4 R). Based on the in-situ electrochemical polymerization and alkaline elution, a PAAMPA-PDA MIP chemically modified electrode with molecular recognition was prepared by the modification of surface of a glassy carbon electrode(GCE) with PAAM-PA-PDA MIP. In addition, as-prepared PAAM-PA-PDA MIP chemically modified electrode was characterized by SEM, cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS). It is found that the PAAM-PA-PDA MIP chemically modified electrode could be applied in the electrochemical detection of P4 R with linear detection range from 10 μmol/L to 200 μmol/L, high sensitivity of0.085 A/mol/L and low detection limit of 23.6 nmol/L, which presents potential application in the practical detection of P4 R.

关 键 词：化学修饰电极 分子印迹聚合物 胭脂红 电化学检测 分子识别 

分 类 号：O657.1[理学—分析化学] TS264.4[理学—化学]