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报道了一种新型聚吡咯-酰基吡唑啉酮复合膜修饰玻碳电极(Ppy/HPMαFP/GCE)对酚磺乙胺(ETH)电化学性质及其反应机理的研究。酚磺乙胺的电化学性质检测运用循环伏安法和脉冲伏安法。实验表明,与裸GCE和Ppy/GCE相比,Ppy/HPMαFP/GCE修饰电极对酚磺乙胺有良好的催化作用。聚吡咯与酰基吡唑啉酮产生了协同增效作用。在pH=5.5的磷酸盐(PBS)缓冲溶液中,该修饰电极测试ETH的CV曲线于0.35V和0.4V出现一对灵敏的氧化还原峰,峰电位差△Ep较裸玻碳电极降低510mV,比Ppy修饰电极降低100mV,峰电流显著增加。在最佳条件下,氧化峰电流与ETH浓度于2.0×10-6~1.0×10-4mol.L-1范围内呈现良好的线性关系,检出限为6.0×10-7mol.L-1。
A new type of polypyrrole-acylpyrazolone composite membrane modified glassy carbon electrode (Ppy / HPMαFP / GCE) on the electro-chemical properties of phenolthioethylamine (ETH) and its reaction mechanism. The electrochemical properties of phenol sulfonamide detection using cyclic voltammetry and pulse voltammetry. Experiments show that, compared with bare GCE and Ppy / GCE, Ppy / HPMαFP / GCE modified electrode has good catalytic effect on phenylethylamine. Polypyrrole has synergistic effects with acylpyrazolones. The CV curve of the modified electrode for ETH showed a pair of sensitive redox peaks at 0.35V and 0.4V in phosphate buffer solution (pH = 5.5). The peak potential difference ΔEEP was reduced by 510mV compared with bare glassy carbon electrode. Ppy modified electrode lower than 100mV, peak current increased significantly. Under the optimum conditions, the peak current of the oxidation showed a good linear relationship with the concentration of ETH in the range of 2.0 × 10-6 ~ 1.0 × 10-4mol.L-1 with the detection limit of 6.0 × 10-7mol.L-1.