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首页> 外文期刊>International Journal of Electrochemical Science >Modified Graphite Paste Electrode with Strontium Phen-Dione Complex for Simultaneous Determination of a Ternary Mixture of 4-aminophenol, Uric Acid and Tryptophan (Part I)
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Modified Graphite Paste Electrode with Strontium Phen-Dione Complex for Simultaneous Determination of a Ternary Mixture of 4-aminophenol, Uric Acid and Tryptophan (Part I)

机译：锶苯二酮配合物修饰的石墨糊电极，用于同时测定4-氨基酚，尿酸和色氨酸的三元混合物（第一部分）

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摘要

For the first time, the [Sr(OH2)4(phen-dione)2](Cl)2 complex (Sr-Phen) was synthesized and characterized by different spectroscopy techniques such as 1H-NMR, UV-Vis, FT-IR and conductometry as well as elemental analysis. The prepared complex was used for modification of graphite paste electrode for simultaneous determination of 4-aminophenol (AP), uric acid (UA), and tryptophan (Trp). Detailed investigations by electrochemical impedance spectroscopy and electrochemistry methods were used in order to elucidate the properties of the modified graphite paste electrode with Sr-Phen. The proposed modified electrode displays intense and indelible electrooxidation responses for simultaneous determination of AP, UA, and Trp to three well-separated peaks in potential range from 0.4 to 1.1V using cyclic and differential pulse voltammetry methods in pH 2.0. Based on the experimental results the detection limits of 3.40, 1.06 and 1.32 μM were obtained for AP, UA and Trp, respectively. Finally, the proposed modified electrode was used for simultaneous determination of AP, UA and Trp in real samples.
机译：首次合成[Sr（OH2）4（phen-dione）2]（Cl）2配合物（Sr-Phen），并通过不同的光谱技术，例如1H-NMR，UV-Vis，FT-IR进行表征电导和元素分析。制备的配合物用于修饰石墨糊电极，用于同时测定4-氨基苯酚（AP），尿酸（UA）和色氨酸（Trp）。为了阐明具有Sr-Phen的改性石墨糊电极的性能，使用了电化学阻抗谱和电化学方法进行了详细研究。拟议的修饰电极在pH 2.0下使用循环和差分脉冲伏安法，可同时测定AP，UA和Trp至0.4至1.1V电位范围内的三个良好分离的峰，显示出强烈且不可磨灭的电氧化响应。根据实验结果，AP，UA和Trp的检出限分别为3.40、1.06和1.32μM。最后，提出的修饰电极用于同时测定真实样品中的AP，UA和Trp。

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