▎ 摘　　要

NOVELTY - The pretreatment method for detection of paraben ester preservative involves (1) synthesizing phenyl-modified mesoporous magnetic graphene composite material and (2) using phenyl-modified mesoporous magnetic graphene composite material to detect paraben ester preservatives in cosmetics. USE - Pretreatment method for detection of paraben ester preservative in cosmetics. ADVANTAGE - The pretreatment method enables detection of paraben ester preservative with high specific surface area, uniform pore size distribution and excellent magnetic response and less time-consumption.