title: Identification and determination of the major constituents in traditional Chinese medicinal plant Polygonum multiflorum thunb by HPLC coupled with PAD and ESI/MS.
abstract: An HPLC-PAD-MS method has been developed for the qualitative and quantitative analysis of the major chemical constituents in Polygonum multiflorum Thunb. Chromatographic separation was conducted on an Alltima C18 column using water:acetonitrile:acetic acid as the mobile phase. Altogether nine compounds of various classes, including stilbene glucosides, anthraquinone glucosides and anthraquinone derivates, were identified by online ESI/MS. Their identities were ascertained by comparison with data derived from the literature and/or standard compounds. Five components were quantified by HPLC-PAD and the method was fully validated. All the linear regressions were acquired with R2 > 0.99 and the quantification limits (with a signal-to-noise ratio of 3) ranged from 0.63 and 1.57 ng. Repeatability was evaluated by intra- and inter-day assays and RSD value was within 2.47%. Recovery studies for the quantified compounds were found to be within the range 96.32-102.53% with RSD less than 2.35%. The overall procedure is rapid and reproducible and is considered suitable for qualitative and quantitative analysis of a large number of samples.
authors.affiliation: Research and Development Division, School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong Special Administrative Region, People's Republic of China.
authors.forename: Tao
authors.initials: T
authors.lastname: Yi
authors.forename: Kelvin S Y
authors.initials: KS
authors.lastname: Leung
authors.forename: Guang-Hua
authors.initials: GH
authors.lastname: Lu
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.forename: Kelvin
authors.initials: K
authors.lastname: Chan
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D008516:Medicine, Chinese Traditional; D015394:Molecular Structure; D010783:Photometry / Q000379:methods*; D011083:Polycyclic Compounds / Q000737:chemistry; D028502:Polygonum / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D011083:Polycyclic Compounds