Structural Characterization of Flavonoid Glycoconjugates and Their Derivatives with Mass Spectrometric Techniques.
Mass spectrometry is currently one of the most versatile and sensitive instrumental methods applied to structural characterization of plant secondary metabolite mixtures isolated from biological material including flavonoid glycoconjugates. Resolution of the applied mass spectrometers plays an important role in structural studies of mixtures of the target compounds isolated from biological material. High-resolution analyzers allow obtaining information about elemental composition of the analyzed compounds. Application of various mass spectrometric techniques, including different systems of ionization, analysis of both positive and negative ions of flavonoids, fragmentation of the protonated/deprotonated molecules and in some cases addition of metal ions to the studied compounds before ionization and fragmentation, may improve structural characterization of natural products. In our review we present different strategies allowing structural characterization of positional isomers and isobaric compounds existing in class of flavonoid glycoconjugates and their derivatives, which are synthetized in plants and are important components of the human food and drugs as well as animal feed.
Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479 Poznań, Poland. pkac@igr.poznan.pl.
Piotr
P
Kachlicki
Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479 Poznań, Poland. akar@igr.poznan.pl.|Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland. akar@igr.poznan.pl.
Anna
A
Piasecka
Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland. mackis@ibch.poznan.pl.
Maciej
M
Stobiecki
Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland. lukasmar@ibch.poznan.pl.
Łukasz
Ł
Marczak
D000818:Animals; D005419:Flavonoids / Q000737:chemistry*; D006001:Glycoconjugates / Q000737:chemistry*; D006801:Humans; D013058:Mass Spectrometry; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry
D005419:Flavonoids; D006001:Glycoconjugates; D010936:Plant Extracts
collision induced dissociation (CID); electrospray ionization—ESI; flavonoid glycoconjugates; gas chromatography; liquid chromatography; mass spectrometry; matrix assisted laser desorption ionization—MALDI; soft ionization; tandem mass spectrometry