Preparation and Recognition Properties of Vanillin-Imprinted Polymers

✍ Scribed by Guo-Song Wang; Qiu-E Cao; Jie Xiong; Xiu-Fang Zhu; Neng-Bang Hou; Zhong-Tao Ding

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: German
• Weight: 93 KB
• Volume: 89
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.200690273

✦ Synopsis

Abstract

Some new molecularly imprinted polymers (MIPs) were prepared by different protocols involving vanillin as the imprinted molecule, methacrylic acid (= 2‐methylprop‐2‐enoic acid; MAA) as the functional monomer, and ethylene glycol dimethacrylate (EGDMA = 2‐methylprop‐2‐enoic acid ethane‐1,2‐diyl ester) as the cross‐linking agent. The adsorption property of the imprinted polymers was studied by UV spectrophotometry and HPLC. The results indicated that the porogen solvent had a certain influence on the adsorption performance of the polymer. The vanillin‐imprinted polymer MIP~1~ prepared with MeOH as porogen, exhibited advantageous characteristics, i.e., a high binding activity, a good selectivity, and a rapid adsorption equilibrium. The binding parameters studied by Scatchard analysis established that there are two types of binding sites in MIP~1~. Finally, by packing an SPE column (SPE = solid‐phase extraction) with the polymer MIP~1~, the vanillin was separated and enriched successfully by this sorbent from the samples of Vanilla fragrans and beer.