分析化学2026，Vol.54Issue(5)：805-813,9.DOI:10.19756/j.issn.0253-3820.261088
基于聚乙烯亚胺稳定的荧光聚多巴胺/Fe2+的开-关型荧光传感技术检测草甘膦
An"On-off"Fluorescent Sensing Platform Based on Polyethyleneimine-Stabilized Fluorescent Polydopamine/Fe2+for Glyphosate Detection
摘要
Abstract
As a widely used broad-spectrum herbicide worldwide,glyphosate(GLY)residues in the ecological environment and agricultural products pose potential threats to human health.Therefore,development of efficient and sensitive detection methods for GLY is of great significance.In this study,a novel"on-off"fluorescence sensor for GLY detection was developed based on the interaction among polyethyleneimine-stabilized fluorescent polydopamine(PEI-PDA),ferrous ion(Fe2+),and GLY.The prepared PEI-PDA exhibited green fluorescence emission at 530 nm.The fluorescence of PEI-PDA was slightly quenched by Fe2+through dynamic quenching,and the subsequent addition of GLY further diminished the fluorescence intensity.Under optimized conditions,the sensor exhibited a linear response to GLY concentration in the range of 0.5-500 μmol/L,with a limit of detection(S/N=3)of 0.64 μmol/L.The proposed method had high sensitivity,excellent specificity,and rapid response.The spiked recoveries in real sample analysis ranged from 88.03%to 105.44%,providing a simple and reliable novel sensing strategy for detection of GLY in the environment.关键词
"开-关"型/荧光探针/聚乙烯亚胺-聚多巴胺/草甘膦/亚铁离子Key words
"On-off"/Fluorescent probe/Polyethylene-polydopamine/Glyphosate/Ferrous ion引用本文复制引用
段明坤,熊若帆,张坤,金龙,李威,李胎花..基于聚乙烯亚胺稳定的荧光聚多巴胺/Fe2+的开-关型荧光传感技术检测草甘膦[J].分析化学,2026,54(5):805-813,9.基金项目
江苏省自然科学基金项目(No.BK20191387)资助. Supported by the Natural Science Foundation of Jiangsu Province(No.BK20191387). （No.BK20191387）
