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Abstract: A molecularly imprinted polymer(MIP)with special molecule recognition properties for carbofuran was prepared by precipitation polymerization using carbofuran as template molecule,methacrylic acid(MAA)as functional monomer and ethylene glycol dimethacrylate(EGDMA)as the cross-linker.The optimized ratio was obtained to be n(carbofuran):n(MAA)=1:6 by the analysis of infrared spectroscopy.The infrared spectrum of the polymer also indicated that there were some characteristic groups in the MIP which could interact with the template.The SEM graph of imprinted polymer showed that the binding sites recognized with template molecules existed in the surface of polymer.The template polymer adsorption capacity,binding kinetics and selectivity of MIP were investigated by equilibrium binding experiment.The results showed that compared with non-imprinted polymer,imprinted polymer carbofuran showed strong absorption features and good specificity,and could get the maximum adsorptive capacity in 3 h.The water samples spiked at three concentration levels of 10,50 and 100 mg/L carbofuran were prepared by solid phase extraction(SPE)column and determined by HPLC with recoveries of 94%-117% and relative standard deviations(n=3)of 2.5%-4.7%.
Template and target information: carbofuran
Author keywords: carbofuran, molecularly imprinted polymer (MIP), solid phase extraction (SPE), absorption feature