基于表面分子印迹技术及相转化过程的双酚A电化学传感器

Electrochemical Sensors for Bisphenol A Based on Surface Molecularly Imprinting Technology and Phase Inversion Process

以双酚A(Bisphenol A,BPA)为模板,氨基化硅胶为载体合成了对BPA有特异选择性的表面分子印迹聚合物(surface molecularly imprinted polymer,sMIP).然后以聚氯乙烯(PVC)为支撑基质,通过相转化过程(phase inversion process)制成BPA分子印迹聚合物膜,将聚合物膜固载到处理过的金电极表面,制成电流型双酚A电化学传感器.优化了pH值、温度等实验条件,结果表明在10～120μg/mL范围内对双酚A有良好的线性响应(R=0.9971).传感器用于实际水样的测定,结果令人满意.

Surface molecularly imprinted polymer （sMIP）, which has specific selectivity to bisphenol A （BPA）, was synthesized using BPA as template molecules and aminated silica gel as carrier. Based on that, MIP membrane was prepared by a phase inversion process using polyvinyl chloride （PVC） as support substratum and the amperometric sensor was constructed through immobilization of the MIP membrane on golden electrode surface. The sensor displayed a good linear range of 10- 120 μg/mL under optimized pH and temperature conditions. The water samples were determined with satisfactory results.