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应用化学
Chinese Journal of Applied Chemistry    2011, Vol. 28 Issue (05) : 531-536     DOI: 10.3724/SP.J.1095.2011.00418
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Preparation of Rhodamine B Molecularly Imprinted Polymer Microspheres and Its Application in Solid Phase Extraction
LEI Xiulan1,2, YI Xiang1,2, YUAN Yang1,2, ZENG Yanbo1, LI Lei1*
(1.College of Biology and Chemical Engineering,Jiaxing University,Jiaxing 314001;
2.College of Chemistry and Chemical Engineering,Changzhou University,Changzhou)
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Abstract  

Molecular imprinting technology was employed to produce one kind of rhodamine B(RhB) molecularly imprinted polymer(MIP) microspheres by precipitation polymerization using RhB, acrylamide, ethylene glycol dimethacrylatea(EGDMA), azobisisobutyronitrile(AIBN), and acetonitrile as template, functional monomer, cross-linking agent, initiator and porogen, respectively. The resultant microspheres were characterized by scanning electron microscopy. The binding constant and chemical combination ratio of the complex formed between the template and the functional monomer were obtained by UV spectrophotometry, which showed that the RhB-monomer forms 1∶1 complexes and the binding constant is 5.3×103 L/mol. The effects of types and volumes of the porogen on the size and the uniformity of microspheres were also discussed. After packing the microspheres into column, it was used to absorb RhB from red pepper. The extraction conditions of molecular imprinting solid phase extraction(MISPE) column for RhB were optimized. Pepper samples spiked with RhB were extracted by MISPE column and analyzed by high performance liquid chromatography. The recoveries of MISPE column for RhB extraction were found to be 91.7%~103.5%, indicating the feasibility of the prepared MIPs for RhB extraction.

Keywords molecularly imprinted polymer microspheres      rhodamine B      precipitation polymerization      ultraviolet spectrophotometry      solid phase extraction     
CLC:  O657  
Corresponding Authors: li lei   
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Received: 2010-07-19      Revised: 2010-09-09     
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LEI Xiu-Lan
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LEI Xiu-Lan,YI Xiang,YUAN Xiang, et al. Preparation of Rhodamine B Molecularly Imprinted Polymer Microspheres and Its Application in Solid Phase Extraction[J]. Chinese Journal of Applied Chemistry, 2011, 28(05): 531-536.
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http://yyhx.ciac.jl.cn/EN/10.3724/SP.J.1095.2011.00418     OR     http://yyhx.ciac.jl.cn/EN/Y2011/V28/I05/531
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