Differentiation of isomeric malonylated flavonoid glyconjugates in plant extracts with UPLC‐ESI/MS/MS

Abstract

Application of UPLC-MS/MS allows separation and identification numerous positional isomers of malonylated glycosides of flavonoids and isoflavonoids in plant material. Provided there is strict control of the MS ionisation parameters, this method may be useful for preparation of a flavonoids spectra database, enabling the inter-laboratory comparison of analytical results.