▎ 摘　　要

NOVELTY - The method for removing sulfate impurities in graphene oxide synthesis system involves: (1) synthesizing graphene oxide using Hummer's method or improved Hummer's method, and obtaining graphene oxide synthesis system after synthesis is completed; and (2) mixing the graphene oxide synthesis system with aqueous solution containing metal cation, adding organic solvent having density greater than water and not miscible with water, stirring to get mixed system, and allowing for layering, where the metal cation is capable of forming precipitate with sulfate. USE - The method is useful for removing sulfate impurities in graphene oxide synthesis system (claimed). ADVANTAGE - The method is capable of simply removing the sulfate impurities in graphene oxide synthesis system with high yield.