▎ 摘　　要

NOVELTY - Magnetic effervescent tablet based on magnetic graphene oxide comprises magnetic graphene oxide, citric acid, sodium bicarbonate, 1-octyl-3-methylimidazolium chloride and lithium bistrifluoromethanesulfonimide. USE - The magnetic effervescent tablet is useful for preparing medicine for removing polycyclic aromatic hydrocarbons and removing 4-benzopyrene and anthracene (all claimed). ADVANTAGE - The method: is environmentally friendly; and has simple operation, high accuracy, and good sensitivity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a method for preparation of magnetic effervescent tablet based on magnetic graphene oxide comprising (1) taking graphene oxide and water, stirring under nitrogen protection, heating up from room temperature to 60-80 degreesC, adding a solution composed of iron(III) chloride hexahydrate, iron(II) chloride tetrahydrate and water, continuously stirring, adding solution consisting of sodium hydroxide and water, continuing the reaction, cooling the mixture to room temperature, pouring into a beaker, using an external magnet to adsorb the synthesized magnetic material, and successively using water and ethanol to wash the magnetic material, drying, and grinding into powder to obtain magnetic graphene oxide, (2) precise weighing of citric acid, sodium bicarbonate, 1-octyl-3-methylimidazolium chloride, bistrifluoromethanesulfonimide lithium and the magnetic graphene oxide, grinding the solid-liquid mixture in a mortar until the powder is homogeneous and fine, and then compressing the mixed homogeneous powder into magnetic effervescent tablets using an infrared tablet machine; and (2) a method for detecting 4-benzopyrene and anthracene based on the magnetic effervescent sheet adsorption of magnetic graphene oxide comprising adding the magnetic effervescent tablet based on magnetic graphene oxide into a centrifuge tube, adding the aqueous solutions of 3, 4-benzenepyrene (BaP) and anthracene (Ant) to the centrifuge tube respectively, after the effervescent tablet is completely disintegrated, holding an external magnet next to the outer wall of the centrifuge tube to separate the magnetic graphene oxide from the aqueous phase, pipetting the supernatant with a dropper, discarding for the magnetic nanomaterials that adsorb 3,4-benzopyrene residues, using 400-2000 mul toluene or acetone to elute 1-6 times, eluting 1-6 times with 400-2000 mul toluene or acetone for magnetic nanomaterials that adsorb anthracene residues, transferring the mixed elution solution to a covered quartz cuvette, and recording the fluorescence intensity using a spectrofluorometer