高等学校化学学报

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (6): 1055.

• 研究简报 • 上一篇    下一篇

壳聚糖与茜素红相互作用的电化学研究

谭学才1,2, 麦智彬1, 邹小勇1,3, 邱俊明1, 蔡沛祥1   

  1. 1. 中山大学化学与化学工程学院, 广州510275;
    2. 广西民族学院化学与生态工程学院, 南宁530006;
    3. 湖南大学化学生物传感与计量学国家重点实验室, 长沙410082
  • 收稿日期:2004-08-17 出版日期:2005-06-10 发布日期:2005-06-10
  • 通讯作者: 蔡沛祥(1940年出生),男,教授,博士生导师,从事电分析化学研究.E-mail:caipx@21cn.com E-mail:caipx@21cn.com
  • 基金资助:

    国家自然科学基金(批准号:20475068);广西壮族自治区自然科学基金(批准号:0141037,0342018)资助.

Electrochemical Behaviour of the Interaction Between Chitosan and Alizarin

TAN Xue-Cai1,2, MAI Zhi-Bin1, ZOU Xiao-Yong1,3, QIU Jun-Ming1, CAI Pei-Xiang1   

  1. 1. School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China;
    2. College of Chemistry and Ecological Engineering, Guangxi University for Nationalities, Nanning 530006, China;
    3. State Key Laboratory of Chem/Biosensing and Chemomitrics, Hunan University, Changsha 410082, China
  • Received:2004-08-17 Online:2005-06-10 Published:2005-06-10

PDF (PC)

被引次数

19

关键词: 壳聚糖, 茜素红, 相互作用, 电化学行为

Abstract: The interaction between Alizarin red(AR) and Chitosan(CS) was investigated in (0.1 mol/L) HAc-NaAc buffer solution(pH=4.5) on the glassy carbon electrode(GC) by cyclic and square wave voltammetry. The results show that both AR and AR-CS complex have a well-defined quasi-reversible redox wave(Vpc=-0.46 V, Vpa=-0.41 V) with adsorption characteristics. Electron transfer coefficient(α) and reaction rate constant(Ks) of AR and AR-CS were measured by cyclic voltammetry. The maximum binding numbers m between AR and CS was found to be 2 500. The experiment results confirmed that lower concentration of CS can enhance the detection sensitivity, while higher concentration of CS can lower the detection sensitivity. In the presence of 2.0×10-5 mol/L AR, the peak current of system are proportional to CS concentration in the range of 1.25×10-8～2.5×10-7 mol/L, and inversely proportional to CS concentration in the range of 2.5×10-7～1.25×10-5 mol/L, respectively. The binding interaction mechanism was also discussed.

Key words: Chitosan, Alizarin red, Interaction, Electrochemical behavior

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