| 膨胀石墨电极的制备及用于色氨酸电化学检测的研究 |
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| 引用本文： | 赵炜,孔泳,阚锦晴,陈智栋.膨胀石墨电极的制备及用于色氨酸电化学检测的研究[J].分析化学,2009,37(1). |
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| 作者姓名： | 赵炜 孔泳 阚锦晴 陈智栋 |
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| 作者单位： | 1. 江苏工业学院化学化工学院,常州,213164;江苏省精细石油化工重点实验室,常州,213164
2. 江苏省精细石油化工重点实验室,常州,213164;扬州大学化学化工学院,扬州,225002 |
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| 基金项目： | 国家自然科学基金，江苏省自然科学基金，江苏省商校自然科学基金，江苏省精细石油化工重点实验开放课题 |
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| 摘 要： | 以化学氧化法制备了膨胀石墨,再以石蜡作为粘合剂制备了膨胀石墨电极,该电极兼备电化学传感器和富集待测物分子,缩短传质过程时间的特点.优化了测定条件,在此基础上建立了一种直接测定色氨酸的电分析方法.结果表明:在0.02～0.12 mmol/L范围内,电极响应与色氨酸浓度呈良好的线性关系,检出限为2.0×10-7 mol/L,RSD为2.4%.该电极具有良好的选择性,除酪氨酸外,浓度高达5.0 mmol/L (色氨酸浓度的100倍)的其它8种氨基酸在电极上均没有可测的响应.用该电极测定了医用氨基酸注射液中色氨酸的含量,结果与标称值相符.对色氨酸在膨胀石墨电极表面的富集原因和反应机理进行了初步探讨.
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| 关 键 词： | 膨胀石墨电极 色氨酸 差分脉冲伏安法 选择性 |
Fabrication of Expanded Graphite Electrode and Its Application in Electrochemical Detection of Tryptophan |
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| ZHAO Wei,KONG Yong,KAN Jin-Qing,CHEN Zhi-Dong.Fabrication of Expanded Graphite Electrode and Its Application in Electrochemical Detection of Tryptophan[J].Chinese Journal of Analytical Chemistry,2009,37(1). |
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| Authors: | ZHAO Wei KONG Yong KAN Jin-Qing CHEN Zhi-Dong |
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| Institution: | Faculty of Chemistry and Chemical Engineering;Jiangsu Polytechnic University;Changzhou 213164;Key Laboratory of Fine Petrochemicals of Jiangsu Province;Changzhou 213164;Faculty of Chemistry and Chemical Engineering;Yangzhou University;Yangzhou 225002 |
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| Abstract: | Expanded graphite was prepared by chemical oxidation,and then expanded graphite electrode was fabricated using paraffin as adhesive.The electrode has characteristics of electrochemical sensing,enriching the molecules of analyte and shortening the time used in mass transfer.Various experimental parameters were optimized to analyze tryptophan by employing differential pulse stripping voltammetry.The results of experiment demonstrate that the relationship between the electrode response and the concentration of... |
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| Keywords: | Expanded graphite electrode tryptophan differential pulse stripping voltammetry selectivity |
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