▎ 摘　　要

NOVELTY - Detecting rhodamine B involves preparing the 3 D graphene/iron oxide, processing the detected sample to obtain the standard working sample, using the 3 D graphene/iron oxide for detecting the standard working sample. USE - Method for detecting rhodamine B used for detecting the standard working sample.sed in laboratory cell staining agent and industrial dye such as paper making, printing and dyeing, cosmetic and printing industry. ADVANTAGE - The method is simple, fast, high sensitivity, and has wide linear range. The graphene and rhodamine B have strong?-? interaction and electrostatic attraction effect, the mutual attraction between the two realizes the graphene to rhodamines B strong adsorption effect. The Fe3O4 is combined with the graphene, promoting the adsorptive separation process is simple and fast. The method solves the technical problem that the sample to be detected is separated and enriched and concentrated.