| 多壁碳纳米管修饰碳黑微电极同时测定多巴胺和抗坏血酸 |
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| 引用本文： | 邓培红,张军,黎拒难. 多壁碳纳米管修饰碳黑微电极同时测定多巴胺和抗坏血酸[J]. 分析试验室, 2009, 28(1) |
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| 作者姓名： | 邓培红 张军 黎拒难 |
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| 作者单位： | 衡阳师范学院化学与材料科学系,衡阳,421008;湘潭大学化学学院,湘潭,411105 |
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| 摘 要： | 制备了多壁碳纳米管修饰碳黑微电极,研究了多巴胺(DA)和抗坏血酸(AA)在该修饰电极上的电化学行为.实验表明,在pH 7.0的PBS缓冲溶液中,该修饰电极对DA和从均具有显著的催化氧化作用,AA与DA的氧化电位分别为30 mV和280 mV(vs.SCE).利用二次导数线性扫描伏安法测定,DA与AA的线性范围分别为6.0×10-9～2.0×10-4 mol/L和2.0×10-7～1.0×10-3mol/L,检出限为2.0×10-9mol/L 和1.0×10-7mol/L.方法已用于人工合成样品的分析.
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| 关 键 词： | 碳纳米管 修饰电极 多巴胺 抗坏血酸 伏安法 |
Simultaneous determination of dopamine and ascorbic acid using multi-walled carbon nanotube modified carbon black microelectrode |
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| DENG Pei-hong,ZHANG Jun,LI Ju-nan. Simultaneous determination of dopamine and ascorbic acid using multi-walled carbon nanotube modified carbon black microelectrode[J]. Chinese Journal of Analysis Laboratory, 2009, 28(1) |
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| Authors: | DENG Pei-hong ZHANG Jun LI Ju-nan |
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| Affiliation: | 1.Department of Chemistry and Material Science;Hengyang Normal University;Hengyang 421008;2.College of Chemistry;Xiangtan University;Xiangtan411105 |
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| Abstract: | The carbon black microelectrode modified with the multi-walled carbon nanotube had been prepared and the electrochemical behaviors of dopamine (DA) and ascorbic acid (AA) at the modified electrode were investigated.The experimental results showed that in phosphate buffer solution (PBS pH 7.0) the modified electrode has strong catalytic effect towards the electrochemical oxidation of DA and AA.The oxidation peak potential of AA and DA are 30 mV and 280 mV (vs.SCE).The linear ranges for the determination of D... |
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| Keywords: | Carbon nanotubes Modified electrode Dopamine Ascorbic acid Voltammetry |
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