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首页> 外文期刊>Electroanalysis >Simple and feasible simultaneous determination of three phenolic pollutants on boron-doped diamond film electrode
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Simple and feasible simultaneous determination of three phenolic pollutants on boron-doped diamond film electrode

机译：简单可行的同时测定硼掺杂金刚石膜电极上三种酚类污染物的方法

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摘要

A simple, rapid and feasible method is developed for direct and simultaneous determination of phenol (Ph), hydroquinone (HQ) and 4-nitrophenol (4-NP) on unmodified boron-doped diamond (BDD) electrode. Results showed that the oxidative peaks of these three phenolic compounds can be completely separated on BDD electrode in acidic conditions by using electrochemical cyclic voltammetry technique. The peak potential separations are all higher than 0.35 V Moreover, BDD electrode is extremely easy to be refreshed to obtain current values with good reproducibility, even if it is passivated by phenolic compounds with different adsorption characteristics. All the above features are on account of the outstanding electrochemical characteristics of BDD electrode, and lead to the advantage and feasibility for simultaneous determination of three phenolic compounds without any other separation operation. For each tested phenolic compound, the concentration range with linearity is in two or three orders of magnitude in the presence of other coexisting phenolic compounds with the concentrations more than 1000 times higher than that of the tested component. The present method is also shown to be promising for the determination of phenolic contaminants in the real wastewater samples.
机译：建立了一种简单，快速，可行的方法，用于直接和同时测定未修饰的掺硼金刚石（BDD）电极上的苯酚（Ph），对苯二酚（HQ）和4-硝基苯酚（4-NP）。结果表明，在酸性条件下，采用电化学循环伏安技术可以在BDD电极上完全分离这三种酚类化合物的氧化峰。峰值电位间隔均高于0.35V。此外，即使BDD电极被具有不同吸附特性的酚类化合物钝化，也极容易刷新以得到具有良好重现性的电流值。所有上述特征均归因于BDD电极出色的电化学特性，并带来了无需三种其他分离操作即可同时测定三种酚类化合物的优势和可行性。对于每种被测试的酚类化合物，在存在其他共存酚类化合物的情况下，线性浓度范围为两个或三个数量级，其浓度比被测组分的浓度高出1000倍以上。还表明，本方法对于测定实际废水样品中的酚类污染物很有希望。

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