壳聚糖与茜素红相互作用的电化学研究

作     者：谭学才 麦智彬 邹小勇 邱俊明 蔡沛祥 TAN Xue-Cai;MAI Zhi-Bin;ZOU Xiao-yong;QIU Jun-Ming;CAI Pei-Xiang

作者机构：中山大学化学与化学工程学院 

出 版 物：《高等学校化学学报》 (Chemical Journal of Chinese Universities)

年 卷 期：2005年第26卷第6期

页      面：1055-1057页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：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 

主　　题：壳聚糖 茜素红 相互作用 电化学行为 

摘      要：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.