莱克多巴胺分子印迹聚合物的制备及其性能分析

Preparation and Characteristic Analysis of Ractopamine Molecularly Imprinted Polymers

采用热聚合法制备了莱克多巴胺(ractopamine,RCT)的分子印迹聚合物(molecular imprinted polymers,MIPs)。用紫外分光光度法测定MIPs对RCT的吸附性能,结果发现:RCT在272nm波长处有最大吸光度,测定RCT的回归方程为y=7.354 1x+0.001 0,R2=0.999 9;合成的MIPs对RCT平均吸附率为83.4%。吸附动力学研究表明,MIPs对RCT的吸附时间应控制在10min以内。红外光谱分析表明RCT与功能单体甲基丙烯酸通过氢键形成MIPs,该聚合物能够通过氢键专一地识别和结合RCT分子,从而为建立基于分子印迹技术检测RCT的方法奠定了基础。

A molecularly imprinted polymers （MIPs） of Ractopamine （RCT） was prepared by thermal polymerization method, and the adsorptive characters of the MIPs was investigated with ultraviolet spectrophotometric method. The results showed that RCT had the maximum absorbance value at the wavelength of 272 nm, the regression equation of RCT was y= 7. 354 1x＋ 0. 001 0, R2 =0. 999 9, and the average adsorption rate of MIPs was 83.4%. According to the adsorption kinetics, the adsorp- tion time should be controlled within 10 minutes. Infrared spectrum analysis indicated that the MIPs was formed by hydrogen bonds between RCT and functional monomer methacrylic acid, the MIPs of RCT recognized RCT and combined with it exclusive- ly via hydrogen bonds. The investigation is very useful and important for establishing RCT detection methods based on molecu- larly imprinted technology.