Abstract
The characteristics of the saccharide mass spectra by the atmospheric pressure spray (APS) method have been investigated. The APS mass spectrum depends on the temperature of the capillary from which fine droplets are produced. Under low-temperature operation, only cationized molecules of saccharides are obtained. Under high- temperature operation, however, fragment ions due to the cleavage of glycosidic bonds appear in the APS mass spectra in addition to cationized molecules. These ions produced by high-temperature operation are very useful for obtaining information concerning the saccharide structure. The APS mass spectra of several saccharides containing cationized molecules and fragment ions are presented.
