Spectroscopy Study on the Selectively Distinguishing Cefalexin with the Molecular Imprinted Polymer
JIANG Yu-xiang1, PANG Dao-lin1, HE Qiang2, LAI Cheng-yue1, ZHENG Huai-li2, LI Fang1*
1. College of Chemistry, Key Laboratory of Green Chemistry and Technology, Ministry of Education, Sichuan University, Chengdu 610064, China 2. Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
Abstract：Molecular imprinted polymers of cefalexin (CFL) were prepared by non-covalent molecular imprinting technique in the present paper. Using CFL as template molecule, acrylamide (AM) or methacrylic acid (MAA) as functional monomer, ethylene dimethacrylate (EGDMA) as cross-linker, AIBN as initiator and methanol as porogen agent，different molecularly imprinted polymers (MIPs) of CFL were synthesized by bulk or suspension polymerization as synthetic method. The intermolecular action between AM and CFL was investigated by UV and IR spectrophotometric analysis, and the results indicated that polymerizing functional monomer AM could bond effectively with template molecule CFL. By using UV spectrophotometric analysis method, it was found that the MIP prepared with AM-EGDMA by bulk polymerization showed the highest binding capacity for CFL. Test of selective adsorption made clear that the MIP represented more excellent identification property to CFL than to cefadroxol and ampicillin. The MIPs were used as solid-phase extraction sorbent for extraction and enrichment of CFL in actual samples. And the recoveries for CFL extraction were found to be 99.3%～99.7%(n=3), demonstrating the feasibility of the prepared MIPs for CFL extraction.
蒋宇翔1，庞道林1，何 强2，赖承钺1，郑怀礼2，李 方1* . 分子印迹技术特异性识别头孢类分子的光谱研究[J]. 光谱学与光谱分析, 2011, 31(07): 1852-1856.
JIANG Yu-xiang1, PANG Dao-lin1, HE Qiang2, LAI Cheng-yue1, ZHENG Huai-li2, LI Fang1* . Spectroscopy Study on the Selectively Distinguishing Cefalexin with the Molecular Imprinted Polymer . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(07): 1852-1856.
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