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Molecularly imprinted polymer-based fluorescent sensors for rapid and specific detection of target pesticides
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DOI：10.1039/D6AY00999A.png)
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Abstract
En 中文
This study presents a novel fluorescence sensing platform based on molecularly imprinted polymers (MIPs) for the detection of imidacloprid and chlorpyrifos; two widely used pesticides with potential food safety risks. The fluorescent MIPs (FMIPs) were synthesized via a sol-gel polymerization method using 3aminopropyltriethoxysilane (APTES) as the functional monomer; and fluorescein isocyanate coupled APTES as the fluorescent functional monomer. The resulting FMIPs exhibited high specificity and strong fluorescence quenching responses upon binding to the target pesticides. Under optimized conditions; the corresponding FMIP sensors displayed a linear detection range of 0.02-2 μM for imidacloprid and 0.04-10 μM for chlorpyrifos; with detection limits of 0.012 μM and 0.037 μM; respectively. In addition; the FMIP sensors could realize the specific recognition of the target pesticides within 10 minutes. Validation using water samples achieved spiked recoveries of 75.6-106.5% with relative standard deviations below 9.3%; confirming its practicality for application in real samples.
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