title: Simultaneous determination of ergosterol, nucleosides and their bases from natural and cultured Cordyceps by pressurised liquid extraction and high-performance liquid chromatography.
abstract: A simple method is described for the simultaneous determination of ergosterol, nucleosides and their bases in Cordyceps. The samples were extracted by using pressurised liquid extraction (PLE). The effects of experimental variables, such as solvent, temperature, static extraction time and cycles, on PLE efficiency have been studied. The results showed a strong influence of the solvent and temperature on extraction efficiency of PLE. The determination was achieved by high-performance liquid chromatography (HPLC) using a Zorbax NH2 analytical column (250 x 4.6 mm i.d., 5 microm) with diode-array detector (DAD). The automated preparation of the sample permits a very fast analysis which is an important goal for routine purpose.
authors.affiliation: Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China. spli@umac.mo
authors.forename: S P
authors.initials: SP
authors.lastname: Li
authors.forename: P
authors.initials: P
authors.lastname: Li
authors.forename: C M
authors.initials: CM
authors.lastname: Lai
authors.forename: Y X
authors.initials: YX
authors.lastname: Gong
authors.forename: Kelvin K W
authors.initials: KK
authors.lastname: Kan
authors.forename: Tina T X
authors.initials: TT
authors.lastname: Dong
authors.forename: Karl W K
authors.initials: KW
authors.lastname: Tsim
authors.forename: Y T
authors.initials: YT
authors.lastname: Wang
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D032661:Cordyceps / Q000737:chemistry*; D004875:Ergosterol / Q000032:analysis*; D009705:Nucleosides / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D009705:Nucleosides; D004875:Ergosterol