高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (1): 33.

• 研究论文 • 上一篇    下一篇

吲哚乙酸在纳米金/碳纳米管/壳聚糖修饰玻碳电极上的电化学行为及其检测

张学钰1, 刘兴梅1, 刘伟禄1, 杨明2, 张志权1   

  1. 1. 吉林大学化学学院, 长春 130012;
    2. 吉林大学第一医院乳腺外科, 长春 130021
  • 收稿日期:2009-10-15 出版日期:2010-01-10 发布日期:2010-01-10
  • 通讯作者: 张志权, 男, 博士, 副教授, 从事界面电化学和电分析化学研究. E-mail: zzq@jlu.edu.cn; 杨明, 男, 博士, 副教授, 从事乳腺癌早期诊断及标准化治疗和快速检测方法研究. E-mail: yangming1967@163.com
  • 基金资助:

    国家自然科学基金(批准号: 20605009)资助.

Electrochemical Behavior and Determination of Indole-3-acetic Acid at NanoAu/MWNTs/chitosant Sensor

ZHANG Xue-Yu1, LIU Xing-Mei1, LIU Wei-Lu1, YANG Ming2*, ZHANG Zhi-Quan1*   

  1. 1. College of Chemistry, Jilin University, Changchun 130012, China;
    2. Department of Breast Surgery, The First Hospital of Jilin University, Changchun 130021, China
  • Received:2009-10-15 Online:2010-01-10 Published:2010-01-10
  • Contact: YANG Ming. E-mail: zzq@jlu.edu.cn; ZHANG Zhi-Quan. E-mail: yangming1967@163.com
  • Supported by:

    国家自然科学基金(批准号: 20605009)资助.

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5~200 μmol/L浓度范围内以及0.78 V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y=2.34×10-4+0.14x, 检出限为8.33×10-6 mol/L, 相关系数为0.9997.

关键词: 吲哚乙酸; 壳聚糖; 碳纳米管; 纳米金; 循环伏安法

Abstract:

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.

Key words: Indole-3-acetic acid; Chitosant; Multi-walled carbon nanotubes(MWNTs); NanoAu; Cyclic voltammogram

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