高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (10): 1833.

• 研究简报 • 上一篇    下一篇

L-半胱氨酸在环糊精复合碳纳米管电极上的伏安测定

肖素芳1,2, 王宗花1,2, 罗国安1, 王义明1   

  1. 1. 清华大学化学系, 北京100084;
    2. 青岛大学化学系, 青岛266071
  • 收稿日期:2003-07-21 出版日期:2004-10-24 发布日期:2004-10-24
  • 基金资助:

    国家自然科学基金(批准号:20075015);山东省教育厅科研项目(批准号:03C04)资助

Voltammetric Determination of L-Cysteine at Cyclodextrin-incorporated Carbon Nanotubes Modified Electrode

XIAO Su-Fang1,2, WANG Zong-Hua1,2, LUO Guo-An1, WANG Yi-Ming1   

  1. 1. Department of Chemistry, Tsinghua University, Beijing 100084, China;
    2. Department of Chemistry, Qingdao University, Qingdao266071, China
  • Received:2003-07-21 Online:2004-10-24 Published:2004-10-24

PDF (PC)

关键词: L-半胱氨酸, 碳纳米管, &alpha, -环糊精, 伏安测定

Abstract: A novel modified electrode was constructed by casting α-cyclodextrin-incorporated carbon nanotubes on graphite surface to form a functionalized interfacial layer. The modified electrode exhibits an excellent electrocatalytic activity for the oxidation of L-cysteine. The currents(measured by different pulse voltammetric techniques) increase linearly with the increase of the concentration of L-cysteine in the range from 1×10-6 to2×10-3 mol/L. The detection limit is 2×10-7 mol/L. The modified electrode has the best properties of the two components of the system, such as the electrocatalytic properties of carbon nanotubes and the molecular recognition and accumulation abilities of α-cyclodextrin. The result demonstrates that it has a good stability and reproducibility and is available in the detection of L-cysteine in urine.

Key words: L-Cysteine, Carbon nanotube, α-Cyclodextrin, Voltammetric determination

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