▎ 摘　　要

In this paper, a three-dimensional graphene-based magnetic nanocomposite (3D-G-Fe3O4) was synthesized and used as an effective adsorbent for the extraction of four phthalate esters (dimethyl(o-) phthalate, diethyl(o-)phthalate, diallyo(o-)phthalate and bis(2-propylheptyl)phthalate) from fruit juice prior to high performance liquid chromatography analysis. The three-dimensional nanoporous structure of the 3D-G endows the new material with a high adsorption capacity. The properties and morphology of the 3D-G-Fe3O4 were characterized by transmission electron microscopy, scanning electron microscopy and infrared spectroscopy. Several experimental parameters affecting the extraction efficiencies, such as the amount of the to 97.8%. The result showed that the 3D-G-Fe3O4 has an excellent adsorption capacity for the analytes.