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Studies on the mass spectrometry of natural products: V. Negative ion fast atom bombardment and collisional activation mass spectrometry in the structural analysis of oligoglycosides
Author(s) -
NengYu Chen,
Ning Chen,
Hong Li,
YaoZu Chen,
FangZhi Zhao,
ChangXiang Chen,
ChongRen Yang
Publication year - 1987
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19870050307
Subject(s) - chemistry , fast atom bombardment , mass spectrometry , mass spectrum , ion , mass , adduct , analytical chemistry (journal) , polyatomic ion , chromatography , organic chemistry
The negative ion fast atom bombardment (NFAB) mass spectrometry of eight glycosides containing one to three sugar units have been studied. The mass spectra of NFAB exhibit more predominant quasi‐molecular ions without adduct ions in the high mass region, which indicate more unambiguously the molecular weights of the glycosides, than the positive ion FAB (PFAB) spectra do. Among the three matrix substances tested, glycerol, thioglycerol and PEG‐200, the last one was found to give the best results. The characteristic ions of NFAB collisional activation (NFAB‐CA) spectra of [M‐H] − ions were more abundant and gave more definite information about sequences of the sugar units than the corresponding PFAB‐CA spectra of [M + H]+ ions.