聚吡咯-酰基吡唑啉酮复合膜修饰玻碳电极测定酚磺乙胺的研究  

Electrochemical Behavior and Determination of Ethamsylate on Poly-pyrrole/HPMαFP Complex Film Coated Glassy Carbon Electrode

作　　者：韩慧[1] 李锦州[1] 孙仁霞[1] 

机构地区：[1]哈尔滨师范大学化学化工学院,黑龙江哈尔滨150025

出　　处：《化学与粘合》2012年第2期19-22,共4页Chemistry and Adhesion

基　　金：黑龙江省自然科学基金项目(编号:B201004)

摘　　要：报道了一种新型聚吡咯一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=S．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AEp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2．0x10-6-1．0×10-4tool·L-1范围内呈现良好的线性关系，检出限为6．0×10-Tmol·L-1。In this paper, a novel voltammetric method using poly-pyrrole and acyl-pyrazolone composite film modified glassy carbon electrode （Ppy/HPMαFP/GCE） was developed for studying the electrochemical behavior and reaction mechanism of ethamsylate. The electrochemical parame- ters of ethamsylate were investigated by cyclic voltammetry and differential pulse vohammetry. Compared to the bare GCE and Ppy/GCE, the Ppy/HP- MotFP/GCE showed an excellent electro-catalytical effect on the oxidation of ethamsylate with significant increase in the peak current. The above re- suits indicated that a synergistic effect was existed between poly-pyrrole and HPMctFP. According to the experiment, In PBS buffer solution with a pH of 5.5, a pair of sensitive redox peaks with Epa=0.40V, Epc=0.35V（vs.SCE） was obtained on the PPy/HPMctFP modified electrode. The difference of peak potentials（AEp） was 510mV which was lower than on bare glassy carbon electrode, and about 100mV lower than on Ppy modified electrode. Meanwhile, the peak current markedly increased. Under the optimum conditions, linear calibration curve was obtained in the concentration range of 2.0x10-6 -1.0x10-4 mol ·L-1. The detection limit was 6.0x10-7 mol ·L-1.

关 键 词：聚吡咯 酰基吡唑啉酮 酚磺乙胺 修饰电极 

分 类 号：TQ034[化学工程]