中文摘要：

以壳聚糖（CS）为多壁碳纳米管（MWNTs）的分散介质，通过MWNTs／CS膜上大量氨基静电吸附纳米金粒子（nanoAu），使玻碳电极（GCE）表面形成稳定的nanoAu-MWNTs-CS-GCE修饰层，并采用电化学方法初步研究了该修饰电极的性能．探讨了吲哚乙酸（IAA）在该修饰电极上的电化学行为，结果表明，在5～200μmol／L浓度范围内以及0．78V电位条件下，以循环伏安法（CV）测得的氧化峰电流变化值与c（IAA）呈良好的线性关系，其回归方程为，-2．34×10^-4＋0．14x，检出限为8．33×10^-6mol／L．相关系数为0．9997．

英文摘要：

This study was making use of chitosant as a dispersion medium of multi-walled carbon nanotubes （MWNTs） and formed a stabilizating nanoAu-MWNTs-CS-GCE layer via MWNTs/chitosant with positive charges adsorption of nanoAu with negative charges. Electrochemical method was selected to investigate the performance of the modified electrode and the electrochemical behavior of indole-3-acetic acid. The catalytic current of IAA versus its concentration had a good linearity in a concentration range of 5--200 μmol/L at around -0. 78 V with a detection limit of 8.33× 10-6 mol/L and a correlation coefficient of 0. 9997.