Solid Phase Extraction of Ursolic Acid Using Imprinted Polymer Modified Multi-walled Carbon Nanotubes

详细信息    查看全文

• 作者：Xi LIU^a ; Zhao-Hui ZHANG^a ;   ; ^b ;   ; ^{zhaohuizhang77@163.com} ; Hua-Bin ZHANG^a ; Yu-Fang HU^a ; Xiao YANG^a ; Li-Hua NIE^b
• 关键词：Multi-walled carbon nanotubes ; Molecularly imprinting ; Solid phase extraction ; Ursolic acid
• 刊名：Chinese Journal of Analytical Chemistry
• 出版年：2011
• 出版时间：June 2011
• 年：2011
• 卷：39
• 期：6
• 页码：839-845
• 全文大小：458 K

文摘

A novel surface-imprinted material based on multi-walled carbon nanotubes (MWNT/MIPs) modified with polyethylene glycol was successfully synthesized with a precipitation polymerization method by using ursolic acid (UA) as the template, methacrylic acid (MAA) as the functional monomer, and ethylene glycol dimethacrylate (EGDMA) as the cross-linker. The MWNT/MIPs were characterized by IR and scanning electron microscopy (SEM). The results showed that a stable, uniform imprinted material layer was grafted onto the surface of the MWNT. The adsorption capacity of the MWNT/MIPs toward UA was measured by high-performance liquid chromatography (HPLC). A maximum apparent adsorption capacity of the imprinted polymers toward UA reached up to 100.09 ¦Ìmol g^?. As solid-phase extraction materials, the imprinted polymers extracted UA from actinidia chinensis planch successfully with a concentration enrichment factor of 5.35.