用不同方法制备了四种修饰电极,酪氨酸在聚5-磺基水杨酸/多壁碳纳米管电极上的电化学响应明显优于裸玻碳电极和其他修饰电极.运用多种电化学方法研究了酪氨酸在电极上的电化学行为,结果表明:酪氨酸在电极上的反应是电子数和质子数均为1的扩散控制的不可逆氧化过程,氧化峰电流与酪氨酸的浓度在9.0×10-6～2.0×10-4mol/L的范围内呈良好的线性关系,IP(A)=-1.61×10-9-2.54×10-4c(mol/L),相关系数R=-0.9950,检出限为6.0×10-6mol/L.平均回收率为99.53％.%Four modified electrodes were prepared by different methods. The electrochemical behavior of tyrosine at polymeric 5-sulfosalicylic acid/multi-walled carbon nanotubes modified electrode was significantly better then the bare glassy carbon electrode and other modified electrodes, electrochemical behavior of tyrosine at this modified electrode was studied by a variety of electrochemical methods. The results indicated that the electrochemical behavior of tyrosine at this modified electrode was a diffusion-controlled irreversible oxidation process and the number of electron and proton was 1 .respectively. The oxidation peak current and concentration of tyrosine reflect a good linear relationship in the range of 9.0×10-6~2.0×l0-4mol/L. The correlative coefficient was -0.9950. The detection limit was 6. 0×l0-6mol/L and the average recovery was 99. 53 % .
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