▎ 摘　　要

By using cyclic voltammetric method a pyronine B (PB) and graphene (GR) copolymer was electrochemical formed on carbon molecular wire electrode (CMWE) to get the working electrode (named as PB-GR/CMWE). The synergistic functions of PB and GR resulted in the excellent electrochemical performances with higher conductivity and lower interfacial resistances. Voltammetric behaviors of quercetin on PB-GR/CMWE were investigated by cyclic voltammetry, which gave a pair of well-defined redox response in pH 5.0 phosphate buffer solution. Under the selected conditions, the oxidation peak currents were in linear to quercetin concentration from 0.2 similar to 80.0 mu mol L-1 with the detection limit as 6.37x 10(-8) mol L-1 (3 sigma). The fabricated PB-GR/CMWE was further used to detect quercetin in compound ginkgo leaf tablets with satisfactory results.