基于原位生成荧光聚合物纳米颗粒的草甘膦检测方法OA

A convenient and sensitive fluorescent sensor was successfully constructed for quantitative determination of glyphosate based on the in situ formation of fluorescent polymer nanoparticles(FPNPs)through Cu2+-triggered polymerization and the strong coordination interaction between Cu2+and glyphosate.Cu2+initiated the rapid copolymerization of dopamine(DA)andm-phenylenediamine(MPD),leading to the formation of FPNPs.However,when glyphosate was present,it coordinated with Cu2+,which significantly inhibited the formation of FPNPs,resulting in a decrease of the fluorescence intensity of the system.Consequently,fluorescent detection of glyphosate was achieved based on the Cu2+-DA-MPD system.Under the optimal experimental conditions,the method exhibited a linear detection range of 5–95 μmol/L with a limit of detection as low as 1.75 μmol/L(S/N=3).It also demonstrated high selectivity and excellent anti-interference capability.When this method was employed for detection of glyphosate in actual water samples,spiked recoveries between 97.8%and 103.3%were obtained,demonstrating its reliable practicality and substantial application potential in real sample analysis.Moreover,this method did not require the pre-preparation of fluorescent materials,offering a new idea for rapid detection of glyphosate.