ISSN:
1052-9306
Schlagwort(e):
Chemistry
;
Analytical Chemistry and Spectroscopy
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
This study shows that fast atom bombardment (FAB) in combination with collisional activation and tandem mass spectrometric techniques is useful for the characterization of, and the differentiation between, O-diglycosyl, O-C- diglycosyl, and di-C-glycosyl flavonoids. A quick differentiation between the three types of glycosyl flavonoids is possible by simply examining FAB mass spectra. Low-energy product ion spectra of [M + H] + ions have been used for determining the carbohydrate sequence in O-diglycosyl flavonoids and characterizing the terminal mono-saccharide in O-C-diglycosyl flavonoids. The data obtained for per-O- deuterated precursor ion species of O-diglycosyl flavonoids indicate that O-linked hydrogen atoms are involved in the formation of Yn + ions. High-energy product ion spectra of [M + H] + ions enable further characterization and differentiation of isomeric di-6,8-C-glycosides.
Zusätzliches Material:
6 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/bms.1200230705
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