Figure 8

MALDI-TOF mass analysis of tryptic digest of HRP (0.5 fmol·μL−1) after enrichment with Fe3O4-GO@PDA-Chitosan (a) and Fe3O4-GO@PDA nanocomposites (b); MALDI-TOF mass analysis of tryptic digest of HRP (0.4 fmol·μL−1) after enrichment with Fe3O4-GO@PDA-Chitosan(c) nanocomposites. The peaks of glycopeptides are marked with .