中文摘要：

构建了一种简单的单壁碳纳米管（SWNTs）修饰玻碳电极直接测定绿植中槲皮素的方法。不借助于酶，SWNTs电极对槲皮素催化氧化为醌表现出良好的伏安响应。最优条件下，槲皮素的线性范围为1．5×10^-6-1．3×10^-5mol·L^-1，检出限为5．0×10^-7mol·L^-1（S／N=3）。该修饰电极灵敏性、重现性、稳定性好、便于携带。并能用于测定实际样品，获得满意的回收率。

英文摘要：

A direct electrochemical detection of quercetin based on Single Walled Carbon Nanotubes （SWNTs） modified glassy carbon electrode was demonstrated. SWNTs electrode showed a well-defined voltammetric response to catalyze the oxidation of quercetin to quinone without the need of an enzyme. Under optimum conditions, the determination range for quercetin was from 1.5×10^-6 - 1. 3×10^-5 mol · L^-1 with a low detection limit of 5.0×10^-7 mol ·L^-1 （S/N=3）. Moreover, this modified electrode also displayed excellent sensitivity, fine reproducibility, stability and easy preparation. To further study the practical applicability of real samples was carried out with satisfactory recoveries.