A three-in-one strategy of molecularly imprinted polymers-based electrochemical SERS for sensitive detection of acetamiprid in vegetables

IF 8.5 1区农林科学 Q1 CHEMISTRY, APPLIED

Food Chemistry Pub Date : 2025-02-16 DOI:10.1016/j.foodchem.2025.143439

Xuemei Tang , Ting Wu , Caiying Wang , Wei Zeng , Chengzhen Ji , Jing Wei , Long Wu

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引用次数: 0

Abstract

Selectively trapping analytes in complex matrices to hotspots and performing sensitive detection is an extremely important topic in surface-enhanced Raman spectroscopy (SERS) detection. Herein, a molecularly imprinted polymers-based electrochemical SERS (MIP-EC-SERS) sensor was proposed for detecting acetamiprid (AAP) residue. A polydopamine layer rich in imprinted cavities was fabricated on the surface of AuNPs/ITO, using an electropolymerization process, yielding a SERS substrate modified with MIP (MIP/AuNPs/ITO). Selective capture of AAP by imprinted cavities provided the initial signal enhancement. Subsequently, applying a potential of +0.3 V promoted interactions between AAP and SERS interface, further amplifying the SERS signals. The MIP-EC-SERS sensor achieved a limit of detection down to 3.2 nM and exhibited 13.6 times higher sensitivity than that without applied potential (43.5 nM). Importantly, the practical applicability of the sensor was confirmed by accurately testing AAP in vegetable samples, demonstrating promising application potential for food safety monitoring.

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来源期刊

Food Chemistry 工程技术-食品科技

CiteScore

16.30

自引率

10.20%

发文量

3130

审稿时长

122 days

期刊介绍： Food Chemistry publishes original research papers dealing with the advancement of the chemistry and biochemistry of foods or the analytical methods/ approach used. All papers should focus on the novelty of the research carried out.