稻壳基活性炭修饰碳糊电极对多巴胺的测定

稻壳基活性炭修饰碳糊电极对多巴胺的测定

李陟¹，徐景梅²，许宏鼎¹，吕男¹，齐菊锐¹

1．吉林大学化学学院，长春 130012; 2．长春市环境检测中心，长春 130022

收稿日期:2006-04-10 修回日期:1900-01-01 出版日期:2007-01-26 发布日期:2007-01-26
通讯作者: 齐菊锐

Determination of Dopamine Using the Rice Hull Active Carbon Modified Carbon Paste Electrode by the Voltammetry

LI Zhi¹, XU Jingmei², XU Hongding¹, LV Nan¹, QI Jurui¹

1. College of Chemistry, Jilin University, Changchun 130012, China; 2. Changchun Environmental Monitoring Central Station, Changchun　130022, China

Received:2006-04-10 Revised:1900-01-01 Online:2007-01-26 Published:2007-01-26
Contact: QI Jurui

摘要/Abstract

摘要： 利用稻壳基活性炭与石墨粉直接混合法制备活性炭修饰碳糊电极，在pH=7.63的磷酸缓冲溶液中，用微分脉冲技术的吸附伏安法测定多巴胺，该电极对多巴胺在2× 10^-7~1×10^－３ mol/L范围内分三段成线性响应，检出限为7.5×10^－８ mol/L，抗坏血酸等十余种共存物质基本不干扰. 该电极具有良好的稳定性及重现性.

关键词: 稻壳, 活性炭, 微分脉冲伏安法, 多巴胺

Abstract: The determination of dopamine at the active carbon modified carbon paste electrode (ACMCPE) via cyclic voltammetry and differential pulse voltammetry was studied. Owing to the special quality of abundant surface functional groups, a well quasi reversible redox peak appeared between 0.37 V and 0.04 V when ACMCPE was scanning in pH=7.63 phosphate buffer solution (PBS) containing dopamine at a sc an rate of 100　mV/s. There were three linear calibrate curves of dopamine （DA） in a conc entration range of 2×10^－７~1×10^－３ mol/L for different preconcen tration time. The determination limit at Signal/Noise=3 was 7.5×10^－８ mol/L. Ascorbic acid (AA) as the familiar interfering compound had little interference in the determination of dopamine.

Key words: rice hull, active carbon, differential pulse voltammet ry, dopamine

中图分类号:

O621

李陟，徐景梅，许宏鼎，吕男，齐菊锐. 稻壳基活性炭修饰碳糊电极对多巴胺的测定[J]. J4, 2007, 45(01): 98-102.

LI Zhi, XU Jingmei, XU Hongding, LV Nan, QI Jurui. Determination of Dopamine Using the Rice Hull Active Carbon Modified Carbon Paste Electrode by the Voltammetry[J]. J4, 2007, 45(01): 98-102.

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