酪氨酸在聚5-磺基水杨酸/多壁碳纳米管修饰电极上的电化学行为及其测定  

Electrochemical behavior and determination of Tyrosine at polymeric 5-sulfosalicylic acid/multi-walled nanotubes modified electrode

作　　者：年作权[1] 李将渊[1] 李娟娟[1] 

机构地区：[1]化学合成与污染控制四川省重点实验室,西华师范大学化学化工学院,四川南充637002

出　　处：《化学研究与应用》2012年第11期1675-1679,共5页Chemical Research and Application

基　　金：四川省南充市科学技术局重点科研项目(N2008-SF003)资助

摘　　要：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-sul- fosalicylic acid/multi-walled carbon nanotubes modified electrode was significantly better then the bare glassy carbon electrode and other modified electrodes, eleetreehemical 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 irre- versible 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 × 10^-4 mol/L. The correlative coefficient was -0. 9950. The detection limit was 6.0×10-6mol/L and the average recovery was 99. 53 % .

关 键 词：酪氨酸 修饰电极 5-磺基水杨酸 多壁碳纳米管 电化学 

分 类 号：O657.1[理学—分析化学]