▎ 摘　　要

NOVELTY - Preparation of chitosan-modified reduced graphene nanomaterial involves adding graphene to ethylene glycol, ultrasonically processing, adding chitosan to the graphene oxide dispersion, stirring, performing solvothermal reaction of mixed solution at high temperature, cooling reaction mixture to room temperature, washing with a large amount of deionized water and ethanol, and drying. USE - Preparation of chitosan-modified reduced graphene nanomaterial used in pretreatment of pesticide residues in tea (claimed). ADVANTAGE - The method enables economical preparation of chitosan-modified reduced graphene nanomaterial with large specific surface area, increased surface binding sites, favorable adsorption performance and high recycling rate, by simple process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for usage of chitosan-modified reduced graphene nanomaterial in pretreatment of pesticide residues in tea.