title: Qualitative and quantitative analysis of phenolic acids in Asclepias syriaca L.
abstract: TLC and HPLC was applied to qualitative and quantitative determination of phenolic acids free and liberated by acid and alkaline hydrolysis in common milkweed. The presence of phenolic acids, namely p-hydroxybenzoic, p-coumaric, protocatechuic and caffeic acids, was confirmed in the leaves and flowers. Moreover, the flowers contained gallic acid, and the leaves contained alpha-resorcylic, vanilic and chlorogenic acids. Conjugated forms of phenolic acids predominate in the plant. They hydrolyse mainly to coffeic, p-coumaric, ferulic and p-hydroxybenzoic acids.
authors.affiliation: Department of Pharmacognosy, Karol Marcinkowski University of Medical Sciences, Poznań, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Sikorska
authors.forename: I
authors.initials: I
authors.lastname: Matławska
authors.forename: K
authors.initials: K
authors.lastname: Głowniak
authors.forename: G
authors.initials: G
authors.lastname: Zgórka
mesh_terms: D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D062385:Hydroxybenzoates / Q000032:analysis*; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D062385:Hydroxybenzoates; C017616:phenolic acid