| 聚磺基水杨酸/碳纳米管修饰电极在抗坏血酸共存时测定多巴胺 |
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| 引用本文： | 郑娜,侯书荣,周霞,李向军,袁倬斌.聚磺基水杨酸/碳纳米管修饰电极在抗坏血酸共存时测定多巴胺[J].分析试验室,2009,28(5). |
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| 作者姓名： | 郑娜 侯书荣 周霞 李向军 袁倬斌 |
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| 作者单位： | 中国科学院研究生院化学与化学工程学院,北京,100049 |
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| 基金项目： | 国家自然科学基金，和中国科学院生态环境中心环境化学与生态毒理学国家重点实验室基金 |
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| 摘 要： | 研究了聚磺基水杨酸/多壁碳纳米管修饰玻碳电极的制备及多巴胺在此修饰电极上的电化学行为, 讨论了修饰条件、扫速、溶液 pH 以及抗坏血酸的干扰对多巴胺在这种复合物电极上响应的影响. 在 pH 7.4 磷酸盐缓冲溶液中, 在1.0×10-3 mol/L 抗坏血酸共存的条件下, 多巴胺氧化峰电流与其浓度在 5×10-7～10-4 mol/L 范围内分段呈线性关系, 检出限为 1.0×10-7 mol/L. 结果表明: 聚磺基水杨酸/多壁碳纳米管修饰电极结合了多壁碳纳米管灵敏度高和聚磺基水杨酸选择性好的优点, 可用于抗坏血酸共存条件下多巴胺的测定.
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| 关 键 词： | 化学修饰电极 磺基水杨酸 碳纳米管 多巴胺 抗坏血酸 |
Determination of dopamine in the presence of ascorbic acid using poly(sulfosalicylic acid)/multi-wall carbon nanotube film modified electrode |
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| ZHENG Na,HOU Shu-rong,ZHOU Xia,LI Xiang-jun,YUAN Zhuo-bin.Determination of dopamine in the presence of ascorbic acid using poly(sulfosalicylic acid)/multi-wall carbon nanotube film modified electrode[J].Chinese Journal of Analysis Laboratory,2009,28(5). |
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| Authors: | ZHENG Na HOU Shu-rong ZHOU Xia LI Xiang-jun YUAN Zhuo-bin |
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| Institution: | College of chemistry and chemical engineering;Graduate University;Chinese Academy of Sciences;Beijing 100049 |
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| Abstract: | Modification of a glassy carbon electrode by poly(sulfosalicylic acid)/multi-wall carbon nanotube(PSA/MWCNT) film and its application for determination of dopamine(DA) in the presence of ascorbic acid(AA) are investigated.The effects of modification conditions,scan rate,pH value and interference on the response of the composite modified electrode toward DA were discussed.In phosphate-buffered saline solutions(PBS) of pH 7.4,the oxidation current increased linearly with two concentration intervals of DA in t... |
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| Keywords: | Multi-wall carbon nanotube Sulfosalicylic acid Dopamine Ascorbic acid Determination |
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