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Molecularly Imprinted Poly(thionine)-Based Electrochemical Sensing Platform for Fast and Selective Ultratrace Determination of Patulin

文献类型： 外文期刊

作者： Huang, Qingwen 1 ; Zhao, Zhihui 1 ; Nie, Dongxia 1 ; Jiang, Keqiu 1 ; Guo, Wenbo 1 ; Fan, Kai 1 ; Zhang, Zhiqi 1 ; Meng, 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Lab Qual & Safety Risk Assessment Agroprod Shangh, Shanghai Key Lab Protected Hort Technol, Inst Agrofood Stand & Testing Technol,Minist Agr, 1000 Jingqi Rd, Shanghai 201403, Peoples R China

2.Zhejiang Univ, Coll Pharmaceut Sci, 866 Yuhangtang Rd, Hangzhou 310058, Zhejiang, Peoples R China

期刊名称：ANALYTICAL CHEMISTRY （ 影响因子：6.986； 五年影响因子：6.755 ）

ISSN： 0003-2700

年卷期： 2019 年 91 卷 6 期

页码：

收录情况： SCI

摘要： An innovative approach based on a surface functional monomer-directing strategy for the construction of a sensitive and selective molecularly imprinted electrochemical sensor for patulin recognition is described. A patulin imprinted platinum nanoparticle (PtNP)-coated poly(thionine) film was grown on a preformed thionine tailed surface of PtNP-nitrogen-doped graphene (NGE) by electro-polymerization, which provided high capacity and fast kinetics to uptake patulin molecules. Thionine acted not only as a functional monomer for molecularly imprinted polymer (MIP), but also as a signal indicator. Enhanced sensitivity was obtained by combining the excellent electric conductivity of PtNPs, NGE, and thionine with multisignal amplification. The designed sensor displayed excellent performance for patulin detection over the range of 0.002-2 ng mL(-1) (R-2 = 0.995) with a detection limit of 0.001 ng mL(-1) for patulin. In addition, the resulting sensor showed good stability and high repeatability and selectivity. Furthermore, the feasibility of its applications has also been demonstrated in the analysis of real samples, providing novel tactics for the rational design of MIP-based electrochemical sensors to detect a growing number of deleterious substances.

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