中文摘要：

研究了吡硫醇在单壁碳纳米管修饰电极上的电化学行为，提出了一种检测吡硫醇的电化学方法。在0．1mol／L的NaAc-HAc（pH4．0）缓冲溶液中，吡硫醇在单壁碳纳米管修饰电极上出现一灵敏的氧化峰，峰电位位于0．94V处。与裸玻碳电极相比，单壁碳纳米管修饰电极显著提高了吡硫醇的氧化峰电流。在最佳实验条件下，吡硫醇浓度在9．9×10^-6-5．7×10^-4μmol／L范围内与峰电流呈良好的线性关系，检出限为2．98×10^-7mol／L。吡硫醇在单壁碳纳米管修饰电极上的氧化过程受吸附控制，为1电子2质子的过程。

英文摘要：

The electrochemical behavior of pyritinol at the single-wall carbon nanotube （SWNT）-modified electrode is investigated. In a 0.10 mol/L NaAc-HAc buffer （pH 4.0）, pyritinol exhibits a well-defined and sensitive oxidation peak at the SWNT-modified electrode. The oxidation peak potential is at ca. 0.94 V （vs. SCE）. The oxidation peak currem of pyritinol significantly increases at the SWNT-modified electrode in comparison with that at the bare electrode. Under the optimum conditions, the oxidation peak current is proportional to the concentration of pyritinol over the range from 9.9× 10^-6 to 5.7 × 10^-4 mol/L, and the detection limit is 2.98 × 10^-7 mol/L. The electrode process is controlled by adsorption, and one electron and two protons are involved in the oxidation of pyritinol.