- P-ISSN 2233-4203
- E-ISSN 2093-8950
C8-functionalized magnetic nanoparticles were synthesized by coating magnetic Fe3O4 nanoparticles with silica–amine groups using 3-aminopropyltriethoxysilane and by subsequently modifying the amine groups with chloro(dimethyl)octylsilaneto produce octyl groups on the surface of the MNPs. The C8-functionalized MNPs were used to enrich peptides from trypticprotein digests of myoglobin and α-casein. The enriched peptides were analyzed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI−ΤΟF−MS). MALDI-MS was also used to investigate desalting of the C8-functionalized MNPs. Sample solutions were prepared in 1.0 M NaCl, and the successful removal of salt was observed. Enrichmentwith C8-functionalized MNPs was very effective for separating and concentrating tryptic peptides.
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