High-performance ratiometric magnetic electrochemical sensor for acetamiprid detection using Ag@PDA@Fe3O4 nanocomposites

IF 4 2区农林科学 Q2 CHEMISTRY, APPLIED

Journal of Food Composition and Analysis Pub Date : 2024-10-30 DOI:10.1016/j.jfca.2024.106914

Chengzhen Ji , Xuemei Tang , Lang Wang , Yu Han , Jing Wei , Long Wu

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引用次数: 0

Abstract

Acetamiprid (AAP) is a renowned neonicotinoid insecticide for swift insect control that is prone to residue in agricultural products and threatens human health. Magnetic electrochemical sensor (MES) was developed for high-precision detection of AAP based on silver nanoparticle (AgNPs) and polydopamine (PDA) modified Fe₃O₄ nanocomposites (Ag@PDA@Fe₃O₄). The electrochemical signals generated by AAP hydrolysis and AgNPs oxidation are respectively used as two special signal sources. An increase in AAP concentration led to a proportional increase in the signal from AAP hydrolysis at +0.9 V (I_AAP), while the signal from AgNPs oxidation at +0.27 V (I_Ag) correspondingly decreased. The output signal ΔI_AAP/ΔI_Ag (R²=0.9890) demonstrates a superior linear relationship compared to ΔI_AAP (R²=0.9790) or ΔI_Ag (R²=0.9740) alone. MES demonstrated a broad linear detection range from 0.01 to 2.00 mg L⁻¹ and an impressive limit of detection (LOD, 3S/M) at 3.6 µg L⁻¹. The incorporation of magnetic glassy carbon electrodes (MGCE) significantly mitigates the detachment of nanomaterials. MES has excellent stability and selectivity, and can successfully detect AAP in actual cowpea samples. This study provides pivotal insights into the design of nanomaterial-based ratiometric electrochemical sensors for the sensitive and selective detection of AAP.

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使用 Ag@PDA@Fe3O4 纳米复合材料检测啶虫脒的高性能比率计磁性电化学传感器

啶虫脒（Acetamiprid，AAP）是一种著名的新烟碱类杀虫剂，用于快速控制昆虫，但容易在农产品中残留并威胁人类健康。基于银纳米粒子（AgNPs）和聚多巴胺（PDA）修饰的 Fe3O4 纳米复合材料（Ag@PDA@Fe3O4），开发了用于高精度检测 AAP 的磁性电化学传感器（MES）。AAP 水解和 AgNPs 氧化产生的电化学信号分别作为两个特殊的信号源。AAP 浓度的增加导致 +0.9 V 的 AAP 水解信号（IAAP）成比例增加，而 +0.27 V 的 AgNPs 氧化信号（IAg）相应减少。输出信号ΔIAAP/ΔIAg（R2=0.9890）的线性关系优于单独的ΔIAAP（R2=0.9790）或ΔIAg（R2=0.9740）。MES 的线性检测范围为 0.01 至 2.00 mg L-1，检测限（LOD，3S/M）为 3.6 µg L-1。磁性玻璃碳电极 (MGCE) 的加入大大减少了纳米材料的脱落。MES 具有出色的稳定性和选择性，可成功检测实际豇豆样品中的 AAP。这项研究为设计基于纳米材料的比率电化学传感器灵敏、选择性地检测 AAP 提供了重要启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Food Composition and Analysis 工程技术-食品科技

CiteScore

6.20

自引率

11.60%

发文量

601

审稿时长

53 days

期刊介绍： The Journal of Food Composition and Analysis publishes manuscripts on scientific aspects of data on the chemical composition of human foods, with particular emphasis on actual data on composition of foods; analytical methods; studies on the manipulation, storage, distribution and use of food composition data; and studies on the statistics, use and distribution of such data and data systems. The Journal''s basis is nutrient composition, with increasing emphasis on bioactive non-nutrient and anti-nutrient components. Papers must provide sufficient description of the food samples, analytical methods, quality control procedures and statistical treatments of the data to permit the end users of the food composition data to evaluate the appropriateness of such data in their projects. The Journal does not publish papers on: microbiological compounds; sensory quality; aromatics/volatiles in food and wine; essential oils; organoleptic characteristics of food; physical properties; or clinical papers and pharmacology-related papers.