Wang_2023_Food.Chem_431_137067

Reference

Title : Development of a fluorescent sensor based on TPE-Fc and GSH-AuNCs for the detection of organophosphorus pesticide residues in vegetables - Wang_2023_Food.Chem_431_137067
Author(s) : Wang X , Yu H , Li Q , Tian Y , Gao X , Zhang W , Sun Z , Mou Y , Sun X , Guo Y , Li F
Ref : Food Chem , 431 :137067 , 2023
Abstract :

A novel dual-signal fluorescent sensor was developed for detecting organophosphorus pesticides (OPs). It relies on the catalytic activities of acetylcholinesterase (AChE) and choline oxidase (ChOx) to generate hydrogen peroxide (H(2)O(2)) through the conversion of acetylcholine (ACh) to choline.H(2)O(2) then oxidizes ferrocene-modified tetraphenylethylene (TPE-Fc) to its oxidized state (TPE-Fc(+)), resulting in enhanced cyan fluorescence due to aggregation. Simultaneously, ferrocene oxidation generates hydroxyl radicals (OH), causing a decrease in orange fluorescence of glutathione-synthesized gold nanoclusters (GSH-AuNCs). The presence of OPs restricts AChE activity, reducing H(2)O(2) production. Increasing OPs concentration leads to decreased cyan fluorescence and increased orange fluorescence, enabling visual OPs detection. The sensor has a linear dynamic range of 10-2000 ng/mL with a detection limit of 2.05 ng/mL. Smartphone-based color identification and a WeChat mini program were utilized for rapid OPs analysis with successful outcomes.

PubMedSearch : Wang_2023_Food.Chem_431_137067
PubMedID: 37579609

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Citations formats

Wang X, Yu H, Li Q, Tian Y, Gao X, Zhang W, Sun Z, Mou Y, Sun X, Guo Y, Li F (2023)
Development of a fluorescent sensor based on TPE-Fc and GSH-AuNCs for the detection of organophosphorus pesticide residues in vegetables
Food Chem 431 :137067

Wang X, Yu H, Li Q, Tian Y, Gao X, Zhang W, Sun Z, Mou Y, Sun X, Guo Y, Li F (2023)
Food Chem 431 :137067