Ultra-Sensitive Determination of Fenitrothion Pesticide in Orange Juice by Gold-Printed Electrode Modified with AgNP/Carbon Dot/MWCNT Nanoarchitecture Employing Electrochemical Impedance Spectroscopy

IF 2.6 3区农林科学 Q2 FOOD SCIENCE & TECHNOLOGY

Food Analytical Methods Pub Date : 2024-03-20 DOI:10.1007/s12161-024-02614-9

Joao H. A. Ferreira, Ana Maria A. B. Medeiros, Renato M. Peres, Thiago C. Canevari

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Abstract

This work describes the synthesis, characterization, and electrochemical application of innovative AgNP/carbon dot/MWCNT nanoarchitecture. Silver nanoparticles (AgNPs) have been obtained by directly reducing silver nitrate salt in carbon dot/MWCNT alcoholic solution. UV–vis spectroscopy, HR-TEM, XPS, and electrochemical techniques have characterized this nanoarchitecture. The AgNP/carbon dot/MWCNT nanoarchitecture has been dispersed on a gold-printed electrode surface, showing excellent electrocatalytic activity for fenitrothion determination in acetate buffer, pH 4.5, by impedance electrochemistry spectroscopy with a detection limit of 0.48 nmol L⁻¹. The fenitrothion pesticide detection was also performed in orange juice and did not suffer significant interference from other pesticides.

Graphical Abstract

Abstract Image

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利用电化学阻抗光谱法，用 AgNP/碳点/MWCNT 纳米结构修饰的印金电极超灵敏测定橙汁中的杀螟硫磷杀虫剂

本研究介绍了创新型 AgNP/碳点/MWCNT 纳米结构的合成、表征和电化学应用。通过在碳点/MWCNT 醇溶液中直接还原硝酸银盐，获得了银纳米粒子（AgNPs）。紫外可见光谱、HR-TEM、XPS 和电化学技术对这种纳米结构进行了表征。AgNP/ 碳点/MWCNT 纳米结构分散在金印刷电极表面，在 pH 值为 4.5 的醋酸盐缓冲液中通过阻抗电化学光谱测定杀螟松时显示出优异的电催化活性，检测限为 0.48 nmol L-1。在橙汁中也进行了杀螟硫磷农药检测，没有受到其他农药的明显干扰。

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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.