Electrochemical Detection of Fenthion Insecticide in Olive Oils by a Sensitive Non-Enzymatic Biomimetic Sensor Enhanced with Metal Nanoparticles

Youssra Aghoutane, N. E. Bari, Zoubida Laghrari, B. Bouchikhi
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引用次数: 2

Abstract

Fenthion, an organophosphate insecticide, is a cholinesterase inhibitor and is highly toxic. An electrochemical sensor based on molecularly imprinted polymer is developed here for its detection. For this purpose, 2-aminothiophenol mixed with gold nanoparticles was immobilized on screen-printed gold electrodes. The FEN pattern was then fixed before being covered with 2-aminothiophenol. Cyclic voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy methods were used for the electrochemical characterization. The low detection limit was 0.05 mg/Kg over a range of 0.01–17.3 µg/mL. The sensor was successfully applied for the determination of FEN in olive oil samples with high recovery values.
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金属纳米颗粒增强非酶仿生灵敏传感器电化学检测橄榄油中倍硫磷杀虫剂
倍硫磷是一种有机磷杀虫剂,是一种胆碱酯酶抑制剂,具有剧毒。本文研制了一种基于分子印迹聚合物的电化学传感器。为此,将2-氨基噻吩与金纳米颗粒混合固定在丝网印刷的金电极上。然后在用2-氨基硫酚覆盖之前固定FEN图案。采用循环伏安法、差分脉冲伏安法和电化学阻抗谱法进行了电化学表征。在0.01 ~ 17.3µg/mL范围内,低检出限为0.05 mg/Kg。该传感器可用于橄榄油样品中FEN的测定,具有较高的回收率。
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