| 多臂碳纳米管/Nafion复合材料修饰玻碳电极测定痕量的铅离子 |
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| 引用本文： | 徐琴,刘妮娜,朱俊杰.多臂碳纳米管/Nafion复合材料修饰玻碳电极测定痕量的铅离子[J].中国化学,2005,23(11):1510-1514. |
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| 作者姓名： | 徐琴 刘妮娜 朱俊杰 |
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| 作者单位： | Key Labororatory of Analytical Chemistry for Life Science, Department of Chemistry, Nanjing University, Nanjing, Jiangsu 210093, China |
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| 基金项目： | Project supported by the National Natural Science Foundation＇of China （Nos. 20325516 and 90206037） and the Foundation of State Key Laboratory of Electroanalytical Chemistry from Changchun Institute of Applied Chemistry. |
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| 摘 要： | A composite material of nitric acid oxidized multiwalled carbon nanotube （MWNT） and Nation was prepared. Such composite was modified on a glassy carbon electrode to determine trace of lead by differential pulsed voltammetry. In pH=6.47 NaNO3 solution, Pb^2＋ ions were accumulated on the modified electrode at -0.4 V. Compared with a bare and a Nation film coated electrode, the composite coated GC electrode can reduce the accumulating potential and eliminate the toxic character of mercury. The calibration plots were linear at low concentration of 5.0× 10^-9-2.0× 10^-8 mol/L and high concentration of 2.5× 10^-8-5.0× 10^-6 mol/L. The performances characteristics indicate that the electrode can be used to determine trace Pb^2＋ ions.
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| 关 键 词： | 复合材料 玻璃 碳 电极 电化学 脉冲 |
| 收稿时间： | 2005-01-17 |
| 修稿时间： | 2005-01-172005-07-11 |
Lead Determination on MWNT/Nafion Composite Modified Glassy Carbon Electrodes |
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| XU,;Qin;LIU,;Ni-Na;ZHU,;Jun-Jie.Lead Determination on MWNT/Nafion Composite Modified Glassy Carbon Electrodes[J].Chinese Journal of Chemistry,2005,23(11):1510-1514. |
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| Authors: | XU ;Qin;LIU ;Ni-Na;ZHU ;Jun-Jie |
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| Abstract: | A composite material of nitric acid oxidized multiwalled carbon nanotube (MWNT) and Nafion was prepared. Such composite was modified on a glassy carbon electrode to determine trace of lead by differential pulsed voltammetry. In pH=6.47 NaNO3 solution, Pb2+ ions were accumulated on the modified electrode at ?0.4 V. Compared with a bare and a Nafion film coated electrode, the composite coated GC electrode can reduce the accumulating potential and eliminate the toxic character of mercury. The calibration plots were linear at low concentration of 5.0×10?9–2.0×10?8 mol/L and high concentration of 2.5×10?8–5.0×10?6 mol/L. The performances characteristics indicate that the electrode can be used to determine trace Pb2+ ions. |
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| Keywords: | composite lead electrochemistry differential pulsed voltammetry |
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