Graphene oxide – a precursor of graphene and an ingredient of numerous multicomponent materials – forms a suspension in water. Here, we demonstrate that injection of a graphene oxide suspension to a flowing solution of sulfite anions results in the formation of reduced graphene oxide, which adsorbs on the electrode surface and catalyzes electrooxidation of sulfite anions. The peak current, recorded in a Flow Injection Analysis system with chronoamperometric detection, is proportional to the concentration of graphene oxide in the injected sample.

中文翻译：

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电化学检测氧化石墨烯

氧化石墨烯（石墨烯的前​​体和多种多组分材料的一种成分）在水中形成悬浮液。在这里，我们证明了将氧化石墨烯悬浮液注入亚硫酸盐阴离子的流动溶液中会导致还原的氧化石墨烯的形成，该氧化石墨烯吸附在电极表面并催化亚硫酸盐阴离子的电氧化。在带有计时电流检测的“流动注射分析”系统中记录的峰值电流与所注入样品中氧化石墨烯的浓度成正比。