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首页> 外文期刊>Talanta: The International Journal of Pure and Applied Analytical Chemistry >Electrocatalytic oxidation of nitrite using metal-free nitrogen-doped reduced graphene oxide nanosheets for sensitive detection
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Electrocatalytic oxidation of nitrite using metal-free nitrogen-doped reduced graphene oxide nanosheets for sensitive detection

机译：使用无金属氮掺杂还原氧化石墨烯纳米片进行亚硝酸盐的电催化氧化，用于灵敏检测

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摘要

Nitrite can become poisonous to animals and human beings as it can lead to generation of carcinogenic N-nitrosamines. Metal-free nitrogen-doped reduced graphene oxide (NrGO) exhibited a good electro-catalytic activity toward oxidation of nitrite with the relatively low oxidation potential of 0.68 V (v.s. saturated calomel electrode), thus, a facile electrochemical sensor based on metal-free NrGO was fabricated for sensitive detection of nitrite for the first time. The novel sensor showed a wide linear concentration range from 0.5 to 5000 mu M and a low detection limit of 0.2 mu M at the signal-to-noise ratio of 3 with good selectivity, stability, and reproducibility. This fabricated sensor was used for the determination of nitrite in pickled garlic and river water. These results demonstrate that the facile metal-free NrGO-modified electrochemical sensor has promising applications for the determination of nitrite in food and environment. (C) 2016 Elsevier B.V. All rights reserved.
机译：亚硝酸盐可能对动物和人类有毒，因为它可以导致致癌的N-亚硝胺的生成。不含金属的氮掺杂还原氧化石墨烯（NrGO）对亚硝酸盐的氧化表现出良好的电催化活性，相对较低的氧化电势为0.68 V（相对于饱和甘汞电极），因此是一种基于无金属的简便电化学传感器NrGO首次用于灵敏检测亚硝酸盐。新型传感器在3的信噪比下显示了0.5至5000μM的宽线性浓度范围和0.2μM的低检测限，具有良好的选择性，稳定性和可重复性。这种制造的传感器用于测定腌制的大蒜和河水中的亚硝酸盐。这些结果表明，简便的不含金属的NrGO修饰的电化学传感器在食品和环境中亚硝酸盐的测定中具有广阔的应用前景。 （C）2016 Elsevier B.V.保留所有权利。

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