title: Matrix-assisted ultraviolet laser desorption/ionization time-of-flight (UV-MALDI-TOF) mass spectra of N-acylated and N,O-acylated glycosylamines.
abstract: Matrix-assisted ultraviolet laser desorption/ionization time-of-flight mass spectrometry (UV-MALDI-TOF-MS) has shown to be a very useful technique for the study of the non-volatile and thermally non-stable N-acylated glycopyranosyl- and glycofuranosyl-amines. Of the several matrices tested, 2,5-dihydroxybenzoic acid (DHB) was the most effective giving good spectra in the positive-ion mode. In the linear and reflectron modes, the [M+Na](+) ions appeared with high intensity. Their fragmentation patterns were investigated by post-source decay (PSD) UV-MALDI-TOF-MS showing mainly cross-ring cleavages. In addition, N,O-acylated glycopyranosyl- and glycofuranosyl-amines were also analyzed by this technique. PSD UV-MALDI-TOF-MS gave significant signals for several primary fragment ions, which were proposed but not detected, or observed with very low abundance, in electron ionization mass spectrometry (EI-MS) experiments.
authors.affiliation: The United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan.
authors.forename: Yasuto
authors.initials: Y
authors.lastname: Sato
authors.forename: Yuko
authors.initials: Y
authors.lastname: Fukuyama
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nonami
authors.forename: Rosa
authors.initials: R
authors.lastname: Erra-Balsells
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Stortz
authors.forename: Alberto S
authors.initials: AS
authors.lastname: Cerezo
authors.forename: María C
authors.initials: MC
authors.lastname: Matulewicz
mesh_terms: D000107:Acetylation; D000588:Amines / Q000737:chemistry*; D002138:Calibration; D002625:Chemistry, Organic / Q000379:methods; D005841:Gentisates / Q000737:chemistry; D008956:Models, Chemical; D009584:Nitrogen / Q000737:chemistry*; D009844:Oligosaccharides / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D014466:Ultraviolet Rays