Fluorescence homogenous analysis based on AgNPs quenching carbon dots and polymer dots for simultaneous detection of glyphosate and thiamethoxam in food

IF 8 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical Pub Date : 2025-06-27 DOI:10.1016/j.snb.2025.138209

Limin Hou , Xuelian Hu , Wanyue Pang , Ruoyu Cao , Shuo Wang , Wenxiu Wang , Xiuying Liu , Yiwei Tang

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引用次数: 0

Abstract

A novel homogeneous fluorescence analysis method was developed for the simultaneous detection of glyphosate (GLY) and thiamethoxam (TMX) using aptamer-functionalized carbon dots and polymer dots in conjunction with complementary chain-modified silver nanoparticles (AgNPs). This analytical strategy is based on the principles of fluorescence resonance energy transfer and an indirect competition reaction model. The fluorescence intensity shows a linear correlation with the logarithm of GLY and TMX concentrations over the range of 0.5–1000 ng/mL. The limits of detection for GLY and TMX were determined to be 0.12 ng/mL and 0.10 ng/mL, respectively. The method was successfully applied to the detection of GLY and TMX in various matrices (tap water, apple, pear, and rapeseed oil), with the results being verified by HPLC. This study presents a cost-effective, rapid, and highly sensitive detection method, which holds great promise for future applications in environmental and food-related fields.

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基于AgNPs猝灭碳点和聚合物点的荧光均质分析同时检测食品中草甘膦和噻虫嗪

利用配体功能化碳点和聚合物点与互补链修饰银纳米粒子（AgNPs）结合，建立了一种同时检测草甘膦（GLY）和噻虫嗪（TMX）的均匀荧光分析方法。该分析策略基于荧光共振能量转移原理和间接竞争反应模型。荧光强度与GLY和TMX浓度的对数在0.5 ~ 1000 ng/mL范围内呈线性相关。GLY和TMX的检出限分别为0.12 ng/mL和0.10 ng/mL。该方法成功地应用于各种基质（自来水、苹果、梨、菜籽油）中GLY和TMX的检测，并通过高效液相色谱（HPLC）对结果进行了验证。本研究提出了一种经济、快速、高灵敏度的检测方法，在环境和食品相关领域具有很大的应用前景。

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

Sensors and Actuators B: Chemical 工程技术-电化学

CiteScore

14.60

自引率

11.90%

发文量

1776

审稿时长

3.2 months

期刊介绍： Sensors & Actuators, B: Chemical is an international journal focused on the research and development of chemical transducers. It covers chemical sensors and biosensors, chemical actuators, and analytical microsystems. The journal is interdisciplinary, aiming to publish original works showcasing substantial advancements beyond the current state of the art in these fields, with practical applicability to solving meaningful analytical problems. Review articles are accepted by invitation from an Editor of the journal.