呋喃分子印迹聚合物的制备及其吸附特性  

Preparation and Binding Characteristics of Molecularly Imprinted Polymers for Furan

作　　者：彭宁[1] 阎凤超[1] 陈磊[1] 黄雪松[1] 

机构地区：[1]暨南大学食品科学与工程系,广州510632

出　　处：《分析化学》2010年第4期559-563,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.30871751)资助项目

摘　　要：呋喃是在食品加热过程中形成的潜在致癌物质。本实验以呋喃为模板,2-甲基呋喃为模拟模板,α-甲基丙烯酸(MAA)为功能单体,甲基丙烯酸乙二醇酯(EGDMA)为交联剂,采用非共价法合成分子印迹聚合物(MIP)。优化制备过程,并研究聚合物的吸附动力学、等温吸附及吸附识别性能。结果表明,MIP以2-甲基呋喃作为模拟模板,模板单体配比为1∶4时对呋喃的印迹效果最佳,最大吸收量QMIP=69.64mg/g,印迹因子α=1.879。此聚合物对2-甲基呋喃与呋喃具有相似吸附特性,α=Q2-甲基呋喃/Q呋喃=1.004。固相萃取实验表明,此MIP对速溶咖啡样品中的呋喃具有显著的特异性吸附作用,可以固相萃取食品饮料中痕量呋喃。As a kind of potential carcinogenic materials,furan is formed during the heat treatment and widely exists in the commercial food.In this experiment,furan was chosen as the template,2-methyl furan as dummy template,methacrylicacid（MAA）as function monomers,and ethyleneglycol dimethacrylate（EGDMA）as cross linkers.The molecularly imprinted polymer（MIP）was synthesized by non-covalent method.In this study,the preparation of MIP was optimized,and the kinetics of adsorption,static equilibrium binding and recognition properties of the polymers to furan and 2-methyl furan were also investigated.The results showed that the best imprinting effect（Q MIP =69.64 mg/g,imprinted factorα=1.879）was observed when 2-methyl furan was chosen as dummy template and template monomer ratio was 1∶4.The MIP had the similar absorbability to furan and 2-methyl furan（α=Q 2-methyl furan /Qfuran=1.004）.The results also showed that MIP had specific adsorption for furan in the instant coffee.Thus,it could be used as a solid phase extractant to extract the furan in food and drinks by using solid phase extraction.

关 键 词：呋喃 2-甲基呋喃 分子印迹聚合物 

分 类 号：O633.5[理学—高分子化学] O647.32[理学—化学]