Identification and quantification of glycoside flavonoids in the energy crop Albizia julibrissin.
Oxygen radical absorbance capacity (ORAC) values showed that methanolic extracts of Albizia julibrissin foliage displayed antioxidant activity. High performance liquid chromatography (HPLC) and mass spectrometry (MS) techniques were utilized in the identification of the compounds. The analysis confirmed the presence of three compounds in A. julibrissin foliage methanolic extract: an unknown quercetin derivative with mass of 610 Da, hyperoside (quercetin-3-O-galactoside), and quercitrin (quercetin-3-O-rhamnoside). Fast performance liquid chromatography (FPLC) was employed to fractionate the crude A. julibrissin foliage methanolic extract into its individual flavonoid components. The flavonoids were quantified in terms of mass and their respective contribution to the overall ORAC value. Quercetin glycosides accounted for 2.0% of total foliage.
Department of Chemical Engineering, University of Arkansas, 3202 Bell Engineering Center, Fayetteville, AR 72701, USA.
Ching S
CS
Lau
Danielle J
DJ
Carrier
Robert R
RR
Beitle
David I
DI
Bransby
Luke R
LR
Howard
Jackson O
JO
Lay
Rohana
R
Liyanage
Edgar C
EC
Clausen
D031289:Albizzia / Q000737:chemistry*; D003246:Conservation of Energy Resources; D005419:Flavonoids / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D018515:Plant Leaves
D005419:Flavonoids; D006027:Glycosides