Electrochemical Impedimetric Sensor for Carbofuran Based on Screen-Printed Carbon Electrode Modified with Electrosynthesized Molecularly Imprinted Polypyrrole

IF 3 3区农林科学 Q2 FOOD SCIENCE & TECHNOLOGY

Food Analytical Methods Pub Date : 2025-06-26 DOI:10.1007/s12161-025-02838-3

Ma. Robellene S. Castillo, Jose H. Bergantin Jr, Fortunato Sevilla III

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引用次数: 0

Abstract

Carbamate pesticides are widely used to improve agricultural production; however, their widespread application may leave residues in food, posing a severe threat to human health. In this study, an impedimetric sensor was developed for carbofuran (CBF), a common carbamate pesticide. The CBF sensor was based on a screen-printed carbon electrode modified with molecularly imprinted polypyrrole (MIPPy). MIPPy was deposited on the electrode through electropolymerization of pyrrole using cyclic voltammetry in the presence of CBF. Electrochemical impedance spectroscopy (EIS) was employed as the transduction principle for detecting CBF in aqueous solutions. The electropolymerization and measurement parameters affected the sensor response and were optimized. The sensor response was linear over a concentration range of 0.01 to 0.3 ppm CBF, with a Pearson coefficient of 0.992. The sensor exhibited good reproducibility and accuracy. The sensor was applied successfully in the determination of CBF in vegetable samples and validated through comparison with HPLC results.

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基于电合成分子印迹聚吡咯修饰的丝网印刷碳电极的呋喃电化学阻抗传感器

氨基甲酸酯类农药被广泛用于提高农业生产；然而，它们的广泛使用可能在食品中留下残留物，对人类健康构成严重威胁。本研究开发了一种检测氨基甲酸酯类农药呋喃（carbofuran， CBF）的阻抗传感器。该传感器基于用分子印迹聚吡咯（MIPPy）修饰的丝网印刷碳电极。在CBF存在下，利用循环伏安法将吡咯电聚合沉积在电极上。采用电化学阻抗谱（EIS）作为检测水溶液中CBF的转导原理。对电聚合和测量参数对传感器响应的影响进行了优化。在0.01 ~ 0.3 ppm CBF范围内，传感器响应呈线性关系，Pearson系数为0.992。该传感器具有良好的重现性和准确性。该传感器成功地应用于蔬菜样品中CBF的测定，并与HPLC结果进行了对比验证。

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来源期刊

Food Analytical Methods 农林科学-食品科技

CiteScore

6.00

自引率

3.40%

发文量

244

审稿时长

3.1 months

期刊介绍： Food Analytical Methods publishes original articles, review articles, and notes on novel and/or state-of-the-art analytical methods or issues to be solved, as well as significant improvements or interesting applications to existing methods. These include analytical technology and methodology for food microbial contaminants, food chemistry and toxicology, food quality, food authenticity and food traceability. The journal covers fundamental and specific aspects of the development, optimization, and practical implementation in routine laboratories, and validation of food analytical methods for the monitoring of food safety and quality.