▎ 摘　　要

NOVELTY - Magnetic nanoparticles comprise nucleosome, the nucleosome is made of graphene oxide modified superparamagnetic ferric oxide; shell, the shell covers at least part of the surface of the core body, and the shell is composed of (2Z,4E,6E)-2,4-bis(aminomethylene)-6-(((4-(4,6-bis(4-aminophenyl)-1,3,5-triazin-2-yl)phenyl)amino)methylene)cyclohexane-1,3,5-trione based repeating unit (I). USE - The magnetic nanoparticles are useful in adsorbing triazine herbicides including ametrazine, terbuthylazine, another butylazine, atrazine and trietazine (all claimed). ADVANTAGE - The graphene oxide-modified magnetic nanoparticles: contains core body, which is made of graphene oxide-modified super-paramagnetic ferric oxide; contains shell, and composed of repeating units (I); has super-paramagnetism, and have the advantages of large specific surface area and porous structure; can adsorb and enrich triazine herbicides existing in complex samples, and has strong adsorption capacity and fast speed. DETAILED DESCRIPTION - Magnetic nanoparticles comprise nucleosome, the nucleosome is made of graphene oxide modified superparamagnetic ferric oxide; shell, the shell covers at least part of the surface of the core body, and the shell is composed of (2Z,4E,6E)-2,4-bis(aminomethylene)-6-(((4-(4,6-bis(4-aminophenyl)-1,3,5-triazin-2-yl)phenyl)amino)methylene)cyclohexane-1,3,5-trione based repeating unit of formula (I). INDEPENDENT CLAIMS are also included for: Preparing magnetic nanoparticles, comprising contacting graphene oxide-modified superparamagnetic iron ferric oxide nanoparticles with tris(4-aminophenyl)amine and ultrasonicating, and then performing first stirring, thus to obtain the first mixture; and contacting the first mixture with trialdehyde phloroglucinol and a catalyst and performing a second stirring, thus to obtain final product; Adsorbing triazine herbicides using the magnetic nanoparticles.