| 叶酸在多壁碳纳米管修饰玻碳电极上的电催化氧化及其电分析方法 |
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| 引用本文： | 任超超,孙玉琴,高作宁.叶酸在多壁碳纳米管修饰玻碳电极上的电催化氧化及其电分析方法[J].宁夏大学学报(自然科学版),2010,31(1):70-73. |
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| 作者姓名： | 任超超 孙玉琴 高作宁 |
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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,宁夏,银川,750021 |
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| 基金项目： | 宁夏高等学校科学研究基金资助项目 |
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| 摘 要： | 研究了叶酸（Folic Acid，FA）在多壁碳纳米管修饰玻碳电极（MWCNT／GCE）上的电化学行为．实验结果表明，FA在GCE上的直接电化学氧化十分迟缓，无氧化峰出现，而在MWCNT／GCE上0．681V处出现一个不可逆氧化峰，表明MWCNT／GCE对FA具有良好的电催化作用．测定了FA在MWCNT／GCE上的电催化过程动力学参数，电子转移系数a为0．80，扩散系数D为6．217×10^-5cm^2／s，电极反应速率常数k1为2．15×10^-5cm^2／s．在8×10^6～2×10^-4mol／L浓度范围内，FA峰电流与其浓度呈良好的线性关系，线性方程为Ips（uA）=70．46c＋0．046，r=0．9995，检出限为3×10^-6umol／L,对市售药品进行定量测试，所测样品RSD为1．8％～4．8％，加标回收率为95．5％～102．1％．可用于FA电化学定量测定．
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| 关 键 词： | 叶酸 碳纳米管修饰电极 电催化氧化 电分析方法 |
Electrocatalytic Oxidation of FA at Multi-wall Carbon Nanotubes Modified Glassy Carbon Electrode and Its Electrochemical Application |
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| Ren Chaochao,Sun Yuqin,Gao Zuoning.Electrocatalytic Oxidation of FA at Multi-wall Carbon Nanotubes Modified Glassy Carbon Electrode and Its Electrochemical Application[J].Journal of Ningxia University(Natural Science Edition),2010,31(1):70-73. |
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| Authors: | Ren Chaochao Sun Yuqin Gao Zuoning |
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| Affiliation: | Key Laboratory of Energy Resources and Chemical Engineering/a>;School of Chemistry and Chemical Engineering/a>;Ningxia University/a>;Yinchuan 750021/a>;China |
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| Abstract: | Electrochemical behavior of folic acid(FA) at a multi-walled carbon nanotube modified glassy carbon electrode(MWCNT/GCE) has been investigated.The experimental results demonstrated that the direct electrochemical oxidation of FA were sluggish on GCE,no oxidation peaks appeared.However,on MWCNT/GCE it appeared an irreversible oxidation peak at 0.681V,which indicates that the modified electrode exhibits a good promoting effect on the electrochemical reaction of FA.The electrochemical kinetics parameter has be... |
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| Keywords: | folic acid carbon nanotubes modified glassy carbon electrode electrochemical kinetic electroanalytical method |
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