摘要
以三聚氰胺为模板分子,甲基丙烯酸(MAA)为功能单体,乙二醇二甲基丙烯酸酯(EDMA)为交联剂,通过热引发(偶氮二异丁腈,AIBN)和光引发(Irgacure 1800)两种引发方式合成了对三聚氰胺具有高选择性的分子印迹聚合物.优化考察了三聚氰胺热聚合分子印迹固相萃取柱(MI-SPE热)和光聚合分子印迹固相萃取柱(MI-SPE光)的萃取条件,当萃取柱依次用甲醇和水活化,三聚氰胺标准溶液上样,甲苯、甲醇和水分别淋洗5 mL体积分数为8%的氨化甲醇洗脱时,三聚氰胺在MI-SPE热和MI-SPE光上均有较好的印迹效果,回收率均达到90%以上,且MI-SPE光的回收率大于MI-SPE热的回收率.
The melamine molecularly imprinted polymers(MIPs)were synthesized using melamine as the template molecular,methacrylic acid(MAA)as the functional monomer,ethylene glycol dimethacrylate(EDMA)as the cross-linker agent.The resulted MIPs were used as the sorbents for SPE,respectively,and the extraction conditions for the selective extraction of melamine were detailedly studied in our experiments.The final optimization condition was obtained as follows:MIPs cartridge activated with methanol and water,loaded with melamine standard solution,washed with toluene,methanol and water respectively,and eluted with 5 mL 8% methanol-ammonia.It was demonstrated that both polymers could specially recognize melamine with a good recovery of melamine above 90% for MI-SPEthermal and MI-SPEphoto,and high recoveries of melamine for MIPphoto were obtained due to different microstructure formed in polymerization process.
出处
《河南科技学院学报（自然科学版）》
2011年第6期91-95,共5页
Journal of Henan Institute of Science and Technology(Natural Science Edition)
关键词
三聚氰胺
热引发
光引发
分子印迹聚合物
固相萃取
melamine,thermal-induced initiation,photo-induced initiation,MIPs,solid-phase extraction
