| 多巴胺和抗坏血酸在十六烷基三甲基溴化铵/碳纳米管电极上的检测 |
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| 引用本文： | 侯晓兰,申贵隽,孟梁,祝玲.多巴胺和抗坏血酸在十六烷基三甲基溴化铵/碳纳米管电极上的检测[J].分析试验室,2010,29(11). |
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| 作者姓名： | 侯晓兰 申贵隽 孟梁 祝玲 |
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| 作者单位： | 大连大学环境与化学工程学院,大连,116622 |
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| 摘 要： | 研究了十六烷基三甲基溴化铵(CTMAB)/多壁碳纳米管修饰玻碳电极的制备以及多巴胺和抗坏血酸在该修饰电极上的电化学行为。在CTMAB和多壁碳纳米管的协同作用下,该修饰电极对多巴胺和抗坏血酸均具有显著的催化氧化作用,多巴胺和抗坏血酸的氧化峰电位分别为223mV和15mV,实现了在抗坏血酸共存时测定多巴胺。在pH7.0的磷酸盐缓冲溶液中,多巴胺和抗坏血酸的线性范围分别为2.0×10-6～2.0×10-3mol/L和4.0×10-5～1.0×10-2mol/L,检出限分别为6.0×10-7mol/L和1.0×10-5mol/L。
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| 关 键 词： | 十六烷基三甲基溴化铵 多壁碳纳米管 同时检测 多巴胺 抗坏血酸 |
Simultaneous determination of dopamine and ascorbic acid using a cetyltriethylammnonium bromide/multi-walled carbon nanotube modified glass carbon electrode |
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| HOU Xiao-lan,SHEN Gui-jun,MENG Liang,ZHU Ling.Simultaneous determination of dopamine and ascorbic acid using a cetyltriethylammnonium bromide/multi-walled carbon nanotube modified glass carbon electrode[J].Chinese Journal of Analysis Laboratory,2010,29(11). |
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| Authors: | HOU Xiao-lan SHEN Gui-jun MENG Liang ZHU Ling |
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| Institution: | HOU Xiao-lan,SHEN Gui-jun,MENG Liang and ZHU Ling(College of Environmental and Chemical Engineering,Dalian University,Dalian 116622) |
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| Abstract: | Electrochemical oxidation of dopamine(DA)in the presence of ascorbic acid(AA)was studied on a cetyltrimethylammonium bromide (CTAB) multi-walled carbon nanotube (MWNTs) modified glassy carbon electrode.The results showed that the modified electrode has strong catalytic effect towards the electrochemical oxidation of DA and AA on account of CTAB and MWNTs synergetic effect.The oxidation peak potentials of AA and DA are 15mV and 223 mV,respectively.In the phosphate buffer solution (PBS pH 7.0) the linear rang... |
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| Keywords: | Cetyltriethylammnonium bromide Multi-walled carbon nanotube Simultaneous determination Dopamine Ascorbic acid |
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