槲皮素分子印迹聚邻苯二胺敏感膜电化学传感器

以槲皮素为模板分子,邻苯二胺为功能单体,采用循环伏安法制备了槲皮素分子印迹薄膜修饰电极,并将其用于槲皮素的检测.在HAc-NH4Ac缓冲溶液(pH 4.0)中,以微分脉冲伏安法为电化学激发信号,槲皮素在0.37 V(VS.SCE)处产生一个灵敏的氧化峰,峰电流与其浓度在8.00×10-8~1.00×10-3mol/L范围内呈线性关系,实验检出限为5.00×10-8mol/L.将新方法应用于2种银杏叶类药物中槲皮素的测定,回收率在99.2%~102%之间.

A sensitive quercetin sencor based on molecularly imprinted electropolymer of o-pheny-lenediamine

A electrochemical sensor of Quercetin was prepared based on the molecular imprinting technique, Quercetin as the template molecules, o-pheny-lenediamine as a functional monomer. As molecular imprinting film of Quercetin, poly-o-pheny-lenediamine was coated on the surface of graphite electrode by cyclic voltammetry. A sensitive oxidic peak of Quercetin was observed at 0.37 V（ VS. SCE ） on the sensor by differential pulse voltammetry in the buffer solution of HAc-NH4Ac （ pH 4.0 ）, and its peak current was linear with the concentration over the range of 8.00×10^-8-1.00×10^-3mol/L, with a detection limit of 5.00×10^-8mol/L. The new method was applied to the determination of Quercetin in two Ginkgo biloba drug with the recovery rates ranging from 99.2% to 102%.