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Monitoring levamisole in food and the environment with high selectivity using an electrochemical chiral sensor comprising an MOF and molecularly imprinted polymer

文献类型： 外文期刊

作者： Li, Shuhuai 1 ; Wu, Yuwei 1 ; Ma, Xionghui 1 ; Pang, Chaohai 1 ; Wang, Mingyue 1 ; Xu, Zhi 1 ; Li, Bei 2 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Anal & Test Ctr, Hainan Prov Key Lab Qual & Safety Trop Fruits & Ve, Key Lab Qual & Safety Control Subtrop Fruits & Veg, Haikou 571101, Peoples R China

2.Key Lab Trop Fruits & Vegetables Qual & Safety Sta, Dept Endocrinol Lab, Haikou 570311, Peoples R China

关键词： Cu/Zn-BTC; Molecularly imprinted polymer; Chiral sensor; Food residue; Levamisole

期刊名称：FOOD CHEMISTRY （ 影响因子：8.8； 五年影响因子：8.6 ）

ISSN： 0308-8146

年卷期： 2024 年 430 卷

页码：

收录情况： SCI

摘要： We used an enhanced recognition strategy to fabricate a novel levamisole-detecting chiral electrochemical sensor featuring a metal-organic framework (MOF) combined with a molecularly imprinted polymer (MIP). We first synthesised a Cu/Zn-[benzene-1,3,5-tricarboxylic acid] (Cu/Zn-BTC) MOF as the molecular immobilisation and signal-amplifying unit, and then prepared the MIP (molecular recognition unit) using levamisole as the template on a glassy carbon electrode modified with Cu/Zn-BTC. We obtained a composite chiral sensor with enhanced recognition capability for levamisole after template removal. Using the templated sites as the switch and K3[Fe (CN)6]/K4[Fe(CN)6] as a probe, we established a new method for detecting levamisole in meat products and water bodies. The linear detection range and detection limit of our chiral sensor are 5 to 6000 x 10-11 mol/L and 1.65 x 10-12 mol/L, respectively. Moreover, the sensor exhibited 93.8-109.0% recovery in the detection of levamisole in chicken and other real samples.

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