title: Predictable and linear scale-up of four phenolic alkaloids separation from the roots of Menispermum dauricum using high-performance counter-current chromatography.
abstract: This paper describes how distribution ratios were used for prediction of peak elution in analytical high-performance counter-current chromatography (HPCCC) to explore the method for separation and purification of bioactive compounds from the roots of Menispermum dauricum. Then important parameters related to HPCCC separations including solvent systems, sample concentration, sample loading volume and flow rate were optimized on an analytical Mini-DE HPCCC and finally linearly scaled up to a preparative Midi-DE HPCCC with nearly the same resolutions and separation time. Four phenolic alkaloids were for the first time obtained by HPCCC separation with a two-phase solvent system composed of petroleum ether-ethyl acetate-ethanol-water (1:2:1:2, v/v). This process produced 131.3 mg daurisolin, 197.1 mg dauricine, 32.4 mg daurinoline and 14.7 mg dauricicoline with the purity of 97.6%, 96.4%, 97.2% and 98.3%, respectively from 500 mg crude extract of the roots of M. dauricum in a one-step separation. The purities of compounds were determined by high-performance liquid chromatography (HPLC). Their structures were identified by electrospray ionization mass spectrometer (ESI-MS) and nuclear magnetic resonance (NMR).
authors.affiliation: State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Gaopeng Street, Keyuan Road 4, Chengdu, 610041, China.
authors.forename: Houding
authors.initials: H
authors.lastname: Luo
authors.forename: Ming
authors.initials: M
authors.lastname: Peng
authors.forename: Haoyu
authors.initials: H
authors.lastname: Ye
authors.forename: Lijuan
authors.initials: L
authors.lastname: Chen
authors.forename: Aihua
authors.initials: A
authors.lastname: Peng
authors.forename: Minghai
authors.initials: M
authors.lastname: Tang
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Shi
mesh_terms: D000470:Alkaloids / Q000032:analysis / Q000302:isolation & purification*; D003377:Countercurrent Distribution / Q000379:methods*; D031603:Menispermum / Q000737:chemistry*; D010936:Plant Extracts / Q000032:analysis / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry
chemical_list: D000470:Alkaloids; D010936:Plant Extracts