Molecularly imprinted polymer/graphene oxide modified glassy carbon
electrode for selective detection of sulfanilamide |
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| Authors: | Xiaobing Wei Xinhua Xu Wen Qi Ying Wu and Lihong Wang |
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| Institution: | Analysis and Testing Center, Shandong University of Technology, Zibo, Shandong 255000, China,School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
Analysis and Testing Center, Shandong University of Technology, Zibo, Shandong 255000, China,Beijing Key Laboratory of Energy Nanomaterials, Advance Technology & Materials Co, Ltd, China Iron & steel Research Institute Group, Beijing 100081,
China,Beijing Key Laboratory of Energy Nanomaterials, Advance Technology & Materials Co, Ltd, China Iron & steel Research Institute Group, Beijing 100081,
China and School of Agricultural and Food Engineering, Shandong University of Technology, Zibo, Shandong 255000, China |
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| Abstract: | A novel sensitive electrochemical sensor based on a glassy carbon electrode(GCE) modified with molecularly imprinted polymer(MIP) and grapheme oxide(GO) was developed.The MIP/GO material was prepared by precipitation polymerization in the presence of sulfanilamide as template molecule.The MIP/GO based electrochemical sensor was characterized using scanning electron microscopy(SEM),cyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS) and square wave voltammetry(SWV).The results indicated that the sensor exhibited good affinity and excellent electrochemical response for sulfanilamide.Under optimized conditions,the oxidation peak current intensity of sulfanilamide showed two linear dynamic ranges from 10 to 1000 ng mL~(-1),and the standard deviation was less than 5% using SWV method.The sensor displays good stability,reproducibility,and high sensitivity.It can be further applied to quantify sulfanilamide in milk. |
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| Keywords: | Graphene oxide
Sulfanilamide
Molecularly imprinted polymer
Electrochemical detection |
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