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Abstract: In this work,the molecularly imprinted polymers (MIPs) for chloramphenicol (CAP) (CAP-MIPs) were prepared by ionic liquids assistance using 2-vinylpyridine as functional monomer,ethylene glycol dimethacrylate (EGDMA) as the cross-linker and 2,2'-azobisisobutyronitrile (AIBN) as the initiator in the mixture of tetrahydrofuran and ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm]BF4) as the porogenic solvent. The effects of functional monomer, porogenic solvent on the binding capacity of MIPs were optimized. The MIPs possessed a high capacity and a favorable selectivity for CAP in the preparation of MIPs using 2-vinylpyridine as functional monomer and ionic liquid ([BMIm]BF4) (1:1,by volume) as polymerization solvent. The imprinting factor of CAP-MIPs reached to 2.6. The reusability of CAP-MIPs without any deterioration in capacity was demonstrated for five adsorption-desorption cycles. The developed method was applied in the enrichment and determination of CAP in spiked egg samples using CAP-MIPs as the adsorbent, with CAP recoveries of 62.3%-81.1%.
Template and target information: chloramphenicol, CAP
Author keywords: chloramphenicol, molecularly imprinted polymers (MIPs), Ionic Liquids, Egg, enrichment