Electrochemically pretreated screen-printed carbon electrodes for the simultaneous determination of aminophenol isomers
Electrochemically pretreated screen-printed carbon electrodes for the simultaneous determination of aminophenol isomers
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DOI：
10.1016/j.jelechem.2010.11.028
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发表时间：
2011-02-01
影响因子：
4.5
通讯作者：
Cheng, Shu-Hua
中科院分区：
文献类型：
--
作者：
Su, Wan-Yu;Wang, Sheng-Ming;Cheng, Shu-Hua
本研究报告，一次性，电化学预处理丝网印刷碳电极（SPCE*）可用于同时测定水缓冲溶液中的氨基酚异构体。与未处理的SPCE形成鲜明对比的是，伏安法研究表明，在活化的SPCE* 处，氨基苯酚异构体混合物中的每种分析物的氧化峰电位可以分离。一阶导数技术大大增加了单个氧化峰电流。所有的实验参数进行了优化，以提高响应。导数氧化峰电流与异构体浓度在0.2 - 100 μ M（2-氨基酚）、3.0 - 200 μ M（3-氨基酚）和0.2 - 200 μ M（4-氨基酚）范围内成正比，检出限分别为0.07、0.16和0.05 μ M。所提出的方法具有优良的分析特性，包括易于处理，高灵敏度，宽的线性动态范围和低检测限。该方法用于河水中氨基酚异构体的同时测定，回收率良好。(C)2010 Elsevier B. V.保留所有权利。
This study reports that disposable, electrochemically pretreated screen-printed carbon electrodes (SPCE*) can be employed for the simultaneous determination of aminophenol isomers in aqueous buffer solution. In sharp contrast to untreated SPCE, voltammetric studies indicate that the oxidation peak potential of each analyte in an aminophenol isomer mixture may be separated at the activated SPCE*. The individual oxidation peak currents are greatly increased by first-order derivative techniques. All experimental parameters were optimized to improve responses. The derivative oxidation peak currents is proportional to the concentration of isomer over the range from 0.2 to 100 mu M for 2-aminophenol (2AP), from 3.0 to 200 mu M for 3-aminophenol (3AP), and from 0.2 to 200 mu M for 4-aminophenol (4AP), with detection limits of 0.07, 0.16 and 0.05 mu M, respectively. The proposed methods have excellent analytical characteristics that include ease of handling, high sensitivity, wide linear dynamic range and low detection limits. The assay was applied to the simultaneous determination of aminophenol isomers in river water with good recovery results. (C) 2010 Elsevier B.V. All rights reserved.