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

Analytical Chemistry
Qingwen HuangZheng Han

Abstract

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 electropolymerization, 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 (R2 = 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...Continue Reading

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Citations

Jun 25, 2019·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Atsuko KonishiTatsuya Kitade
Dec 19, 2020·Comprehensive Reviews in Food Science and Food Safety·Guillaume Legrand Ngolong NgeaHongyin Zhang
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Jan 21, 2022·Critical Reviews in Food Science and Nutrition·Daniel MukunziXiaobo Zou

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