Formation of the M+NH_4^+ Ious of Some Mouo-and Di-saccharides in Fast Atom Bombardment Mass Spectrometry

摘要

In positive-ion fast atom bombardment (FAB) mass spectrometry, when mono- and di- saccharides are mixed with an appropriate amount of NH4Cl, a highly abundan peak [M+NH4]+appers in FAB mass spectra . From the adduct ion [M+NH4]+, the molecular weights of mono- and di- saccharides can be determined