title: Simultaneous determination of quercetin and its glycosides from the leaves of Nelumbo nucifera by reversed-phase high-performance liquid chromatography.
abstract: The purpose of this study was to develop reversed-phase HPLC method for the simultaneous determination of the flavonoids from the leaves of Nelumbo nucifera, which have been known to exhibit antioxidant, anti-HIV, antihyperlipidemic and antiobesity effects. HPLC separation was achieved on C(18) column using gradient elution with mobile phase consisting of acetonitrile-water containing 0.1% formic acid. The separated peaks were identified by electrospray ionization mass spectrometry. The HPLC method was validated and applied for the simultaneous determination of the bioactive flavonoids from the leaves of Nelumbo nucifera. In the methanol extract, six flavonoids, quercetin, rutin, quercetin 3-O-beta-D-galactopyranoside (Qc-3-Gal), quercetin 3-O-beta-D-glucopyranoside (Qc-3-Glc), quercetin 3-O-beta-D-glucuronide (Qc-3-Gln) and quercetin 3-O-alpha-arabinopyranosyl-(1-->2)-beta-galactopyranoside (Qc-3-AraGal), were identified. Among them, Qc-3-Glc and Qc-3-Gln were found to be major component in the methanol extract of Nelumbo nucifera leaves.
authors.affiliation: College of Pharmacy, Kyungsung University, Busan 608-736, Korea.
authors.forename: Hyun Ryul
authors.initials: HR
authors.lastname: Goo
authors.forename: Jae Sue
authors.initials: JS
authors.lastname: Choi
authors.forename: Dong Hee
authors.initials: DH
authors.lastname: Na
mesh_terms: D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D013058:Mass Spectrometry; D015394:Molecular Structure; D031653:Nelumbo / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D011794:Quercetin / Q000737:chemistry / Q000302:isolation & purification*; D012015:Reference Standards; D015203:Reproducibility of Results
chemical_list: D006027:Glycosides; D010936:Plant Extracts; D011794:Quercetin