▎ 摘　　要

NOVELTY - Phenylboronic acid functionalized graphene oxide composite nano-material is claimed. The nano-material is obtained by externally coating ferric oxide magnetic nanoparticles with high molecular weight polymer iron oxide magnetic nanoparticles, immobilizing on graphene oxide, performing post-modification of graphene oxide, and introducing phenylboronic acid functional monomer. USE - The phenylboronic acid functionalized graphene oxide composite nano-material is useful in biological analysis, specific identification of glycoprotein in the field of biotechnology, enrichment of glycoprotein, specific recognition of glycopeptides and enrichment of glycopeptide (claimed).