中文摘要：

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。

英文摘要：

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.