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《Chinese Journal of Analytical Chemistry》 2011-06
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Solid Phase Extraction of Ursolic Acid Using Imprinted Polymer Modified Multi-walled Carbon Nanotubes

LIU Xi1,ZHANG Zhao-Hui*1,2,ZHANG Hua-Bin1,HU Yu-Fang1,YANG Xiao1,NIE Li-Hua2 1(College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000) 2(State Key Laboratory of Chemo/Biosensing and Chemometrics,Hunan University,Changsha 410082)  
A novel surface imprinting material based on multi-wall carbon nanotubes(MWNT/MIPs) modified with polyethylene glycol was successfully synthesized with a precipitation polymerization method by using ursolic acid(UA) as template,methacrylic acid(MAA) as functional monomer,and ethylene glycol dimethacrylate (EGDMA) as cross-linker.The MWNT/MIP was characterized by IR and scanning electron microscopy (SEM).The results showed that a stable,uniform imprinted materials layer was grafted on the surface of MWNT.The adsorption capacity of UA on MWNT/MIPs was measured by high performance liquid chromatography.A maximum apparent adsorption capacity of 100.1 μmol/g for the imprinted polymers toward UA was obtained.As solid phase extraction materials,the imprinted polymers extracted UA from actinidia chinensis planch successfully with the concentration enrichment factor of 5.35.
【Key Words】： Multi-walled carbon nanotubes Imprinting Solid phase extraction Ursolic acid
【Fund】： 国家自然科学基金(No.21005030);; 湖南省教育厅重点项目(No.10A099);; 湖南省科技计划项目基金(No.2009FJ3009);; 湖南省大学生创新基金(No.JSU-CX-2010-46)资助
【CateGory Index】： TQ461
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