聚茜素红功能化碳纳米管修饰电极对多巴胺和抗坏血酸的电化学研究  

Electrochemical behaviors of ascorbic acid and dopamine on a polyalizarin red incorporated carbon nanotubes modified electrode

作　　者：王宗花[1] 张旭麟[1] 张菲菲[1] 范雯雯[1] 陈悦[1] 

机构地区：[1]青岛大学纤维新材料与现代纺织实验室国家重点实验室培育基地,青岛266071

出　　处：《分析试验室》2007年第10期17-20,共4页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(20475029);山东省优秀中青年科学家科研奖励基金(2004BS04008)项目资助

摘　　要：采用电聚合方法将茜素红非共价修饰到碳纳米管上,制备了聚茜素红/碳纳米管修饰电极。以多巴胺(DA)和抗坏血酸(AA)为模型化合物,研究该修饰电极的电催化作用。结果表明:电聚合法使茜素红牢固地修饰到碳纳米管上,能显著提高电极的灵敏度和分子识别性能。DA和AA的氧化峰位分离达240 mV。在AA的存在下,DA的差分脉冲伏安法峰电流在1×10-7～1×10-5mol/L范围内呈良好的线性关系,检测下限达1×10-7mol/L。A novel modified electrode was constructed by electro polymerizing alizarin red onto carbon nanotubes on the surface of a glassy carbon electrode. Taking dopamine （DA） and ascorbic acid （AA） as model compounds, the modified electrode showed a favorable ability of discrimination and sensibility, and the anodic peak potential difference （△Epa） was more than 250 mV. DA and AA can be determined simultaneously. A differential pulse voltammetric technique for measurement of dopamine over the range of 1 × 10^-7 - 1 × 10^-5 mol/L has been developed. The detection limit was 1 × 10^-7 mol/L.

关 键 词：多巴胺 抗坏血酸 聚茜素红 碳纳米管 

分 类 号：O657.1[理学—分析化学]