电化学预处理丝网印刷碳电极同时测定氨基酚异构体( Electrochemically pretreated screen-printed carbon electrodes for the simultaneous determination of aminophenol isomers )

WY Su SM Wang SH Cheng Practical, Experimental/ carbon electrochemical electrodes electrochemical sensors electrochemistry isomerism organic compounds voltammetry (chemical analysis)/ disposable electrochemically pretreated screen-printed carbon electrodes aqueous buffer solution voltammetry oxidation peak potential analyte aminophenol isomer mixture first-order derivative techniques derivative oxidation peak currents isomer concentration 2-aminophenol 3-aminophenol 4-aminophenol detection limits analytical characteristics river water size 0.2 mum to 200 mum C/ A8280T Chemical sensors A8280F Electrochemical analytical methods A8245 Electrochemistry and electrophoresis B7230L Chemical sensors/ size 2.0E-07 to 2.0E-04 m/ C/int C/el

本文报道了一次性电化学预处理丝网印刷碳电极(SPCE*)可用于缓冲液中氨基苯酚异构体的同时测定。与未经处理的SPCE形成鲜明对比的是，伏安研究表明，在活化的SPCE下，氨基苯酚异构体混合物中各分析物的氧化峰电位可以被分离。一阶导数技术大大提高了单个氧化峰电流。优化了所有实验参数以提高响应。2-氨基苯酚(2AP)在0.2～100μm范围内，3-氨基苯酚(3AP)在3.0～200μm范围内，4-氨基苯酚(4AP)在0.2～200μm范围内，导数氧化峰电流与异构体浓度成正比，检出限分别为0.07、0.16和0.05μm。该方法具有操作简便、灵敏度高、线性动态范围宽、检出限低等优点。该方法用于同时测定河水中的氨基苯酚异构体，回收率良好。

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