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首页> 外文期刊>Electrocatalysis >Electro-Oxidation of Nitrite Using an Oxidized Glassy Carbon Electrode as Amperometric Sensor
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Electro-Oxidation of Nitrite Using an Oxidized Glassy Carbon Electrode as Amperometric Sensor

机译：使用氧化玻碳电极作为安培传感器对亚硝酸盐的电氧化

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In this work, a simple and innovative method is proposed to get an active glassy carbon electrode (GC) toward nitrite oxidation. The oxidation method was based on an anodic treatment, through a time-and potential-controlled electrolysis, in NaOH 0.1 M. This treatment increased the activity in all pH values that were studied, being the pH 8.0 as the best one. It was possible to calculate the kinetic parameters, where the number of transferred electrons calculated was one, and Tafel slope was 70 mV per decade. With these values, a reaction mechanism was postulated. At the best experimental conditions, the electrode has a good behavior as an amperometric sensor versus nitrite oxidation. The system follows linearity in all the range of concentrations and allowed the calculation of analytical parameters such as detection limit, quantification limit, accuracy, and exactitude. Good results were obtained at this point, so the system might be considered a good method for nitrite determination and quantification in aqueous solutions.
机译：在这项工作中，提出了一种简单且创新的方法来使活性玻璃碳电极（GC）趋向亚硝酸盐氧化。氧化方法基于在0.1 M的NaOH中通过时间和电位控制的电解进行的阳极处理。这种处理提高了所研究的所有pH值的活性，其中pH 8.0是最好的。可以计算动力学参数，其中计算的转移电子数为1，Tafel斜率为每十倍70 mV。利用这些值，假定了反应机理。在最佳实验条件下，与亚硝酸盐氧化相比，该电极作为安培传感器具有良好的性能。该系统在所有浓度范围内均保持线性，并允许计算分析参数，例如检出限，定量限，准确度和准确度。在这一点上获得了良好的结果，因此该系统可能被认为是水溶液中亚硝酸盐测定和定量分析的良好方法。

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