Determination of Quercetin with a Polyamide_modified Carbon Paste Electrode
Zhou Qinghai,Huang Baohua (Department of Chemical Engineering, Guangdong University of Technology, Guangzhou 510090) Mo Jinyuan (Department of Chemistry,Zhongshan University,Guangzhou 510275)
The stripping voltammetric determination of quercetin with a polyamide_modified carbon paste electrode has been developed. In the Britton_Robinson buffer (pH=3 60), scanning from 0 45 V ( vs .Ag/AgCl/1 mol·L -1 KCl)to -0 55 V gave a well defined quercetin peak in the I _ E curve at 0 18 V. An excellent linear relationship between the peak current and the quercetin concentration was obtained in the range of 1 0～400 μmolL -1 . The proposed method has been satisfactorily applied to the determination of quercetin in rutin hydrolyzates.
【CateGory Index】： O657.14