Jin Guiying, Huang Fei, Li Wei, Yu Shaoning, Zhang Song, Kong Jilie
Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, PR China.
Talanta. 2008 Jan 15;74(4):815-20. doi: 10.1016/j.talanta.2007.07.023. Epub 2007 Jul 31.
A poly-ABSA/SWNTs composite-modified electrode was fabricated by electropolymerizing aminobenzene sulphonic acid (ABSA) on the surface of glassy carbon electrode (GCE) modified with single-wall carbon nanotubes (SWNTs). SWNTs provide a 3D porous and conductive network for the polymer immobilization. The nanocomposite film was characterized by scanning electron microscope (SEM) and electrochemical impedance spectroscopy (EIS). The results indicated that this composite-modified electrode had strong electrocatalytic activity toward the oxidation of trifluoperazine (TFP). TFP could effectively accumulate on the modified electrode and generate a sensitive anodic peak at 0.72V (versus SCE) in pH 6.1 phosphate buffer solution. Under the selected conditions, the anodic peak current of TFP was linear with its concentration within the range from 1.0x10(-7) to 1.0x10(-5)molL(-1) and 1.0x10(-5) to 1.0x10(-4)molL(-1), and the detection limit was 1.0x10(-9)molL(-1) (S/N=3). This method was successfully applied to the detection of trifluoperazine in drug samples and the recovery was satisfactory. In comparison with the SWNTs/GCE or poly-ABSA/GCE prepared in the similar way, this composite-modified electrode exhibited better catalytic activity.
通过在单壁碳纳米管（SWNTs）修饰的玻碳电极（GCE）表面电聚合氨基苯磺酸（ABSA）制备了聚ABSA/SWNTs复合修饰电极。SWNTs为聚合物固定提供了三维多孔导电网络。用扫描电子显微镜（SEM）和电化学阻抗谱（EIS）对纳米复合膜进行了表征。结果表明，该复合修饰电极对三氟拉嗪（TFP）的氧化具有较强的电催化活性。TFP能有效地在修饰电极上富集，并在pH 6.1的磷酸盐缓冲溶液中于0.72V（相对于饱和甘汞电极）处产生一个灵敏的阳极峰。在选定条件下，TFP的阳极峰电流在1.0×10⁻⁷至1.0×10⁻⁵molL⁻¹以及1.0×10⁻⁵至1.0×10⁻⁴molL⁻¹范围内与其浓度呈线性关系，检测限为1.0×10⁻⁹molL⁻¹（信噪比S/N = 3）。该方法成功应用于药物样品中三氟拉嗪的检测，回收率令人满意。与以类似方式制备的SWNTs/GCE或聚ABSA/GCE相比，该复合修饰电极表现出更好的催化活性。
Zotero 插件