| 甲氧苄啶在多壁碳纳米管-Nafion修饰电极上的电催化氧化及电分析方法 |
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| 引用本文： | 高作宁,孙玉琴,犹卫.甲氧苄啶在多壁碳纳米管-Nafion修饰电极上的电催化氧化及电分析方法[J].分析化学,2009,37(4). |
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| 作者姓名： | 高作宁 孙玉琴 犹卫 |
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| 作者单位： | 宁夏大学能源化工重点实验室,化学化工学院,银川,750021 |
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| 基金项目： | 宁夏高等学校科学研究项目，宁夏大学自然科学基金 |
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| 摘 要： | 用循环伏安法(CV),计时库仑法(CC),计时电流法(CA),线性扫描伏安法(LSV)及电流-时间曲线研究了甲氧苄啶(trimethoprim, TMP)在碳纳米管-Nafion修饰电极(MWCNTs-Nafion/GCE)上的电化学行为,电化学动力学性质以及电分析方法.结果表明,TMP在GCE上有一个极弱的氧化峰,而在MWCNTs-Nafion/GCE上出现一个敏锐的氧化峰,表明MWCNTs-Nafion/GCE对TMP电化学氧化具有良好的催化作用.在扫描速度为10～800 mV/s时其氧化峰电流与扫描速度平方根(v1/2)呈良好线性关系,表明TMP在MWCNTs-Nafion/GCE上的伏安行为是受扩散控制的电化学过程.TMP在MWCNTs-Nafion/GCE上氧化峰电流与浓度在5.0×10-6～1.0×10-3 mol/L范围内呈良好线性关系;检出限为6.6×10-7 mol/L;RSD在0.75%～1 69%之间;加标回收率在98.1%～101.1%之间.本方法简便快捷,测定结果令人满意,可用于TMP的电化学定量测定.
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| 关 键 词： | 甲氧苄啶 碳纳米管-Nafion修饰玻碳电极 电催化氧化 电分析 |
Electrocatalytic Oxidation of Trimethoprim at Multi-wall Carbon Nanotubes-Nafion Modified Glassy Carbon Electrode and Its Electrochemical Determination |
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| GAO Zuo-Ning,SUN Yu-Qin,YOU Wei.Electrocatalytic Oxidation of Trimethoprim at Multi-wall Carbon Nanotubes-Nafion Modified Glassy Carbon Electrode and Its Electrochemical Determination[J].Chinese Journal of Analytical Chemistry,2009,37(4). |
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| Authors: | GAO Zuo-Ning SUN Yu-Qin YOU Wei |
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| Institution: | Ningxia Key Lab of Energy Resources and Chemical Engineering;College of Chemistry and Chemical Engineering;Ningxia University;Yinchuan 750021 |
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| Abstract: | Electrochemical behaviors,electrochemical kinetics and electrochemical determination of trimethoprim(TMP) at multi-wall carbon nanotubes-Nafion modified glassy carbon electrode(MWCNTs-Nafion/GCE) were investigated by cyclic voltammetry(CV),chronocoulometry(CC),chronoamperometry(CA),linear scan voltammetry(LSV) and amperometric i-t curve. The experimental results showed that the direct electrochemical oxidation of TMP is sluggish on GCE,but the oxidation peak current of TMP increases significantly at MWCNTs-... |
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| Keywords: | Trimethoprim carbon nanotubes-nafion modified glassy carbon electrode electrocatalytic oxidation electroanalysis |
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