title: A direct method for the separation and quantification of bile acid acyl glycosides by high-performance liquid chromatography with an evaporative light scattering detector.
abstract: A direct method for the separation and quantification of a series of bile acid acyl glycosides using high-performance liquid chromatography coupled to an evaporative light scattering detector (HPLC-ELSD) is described. Complete separation of each of 15 bile acid acyl 24-alpha-glucosides and their 24-beta-anomers and 24-beta-galactosides was achieved by the stepwise gradient elution mode on a C18 column using a mixture of acetonitrile-methanol (8:2, v/v) and 1% aqueous acetic acid as the mobile phase. 24-beta-Galactosides were always eluted faster than the corresponding 24-beta-glucosides, which eluted after the corresponding 24-alpha-anomers. Calibration curves of different 24-beta-galactosides were linear over a range of 0.2-40 nmol of injected amount and the detection limits (S/N > 3) were from 0.08 to 0.1 nmol. The present HPLC-ELSD method may provide an insight into the separation and quantification of the biologically interesting neutral bile acids.
authors.affiliation: Department of Chemistry, College of Humanities & Sciences, Nihon University, Sakurajousui, Tokyo 156-8550, Japan.
authors.forename: Genta
authors.initials: G
authors.lastname: Kakiyama
authors.forename: Atsuko
authors.initials: A
authors.lastname: Hosoda
authors.forename: Takashi
authors.initials: T
authors.lastname: Iida
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Fujimoto
authors.forename: Takaaki
authors.initials: T
authors.lastname: Goto
authors.forename: Nariyasu
authors.initials: N
authors.lastname: Mano
authors.forename: Junichi
authors.initials: J
authors.lastname: Goto
authors.forename: Toshio
authors.initials: T
authors.lastname: Nambara
mesh_terms: D001647:Bile Acids and Salts / Q000737:chemistry* / Q000592:standards; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006027:Glycosides / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D012015:Reference Standards; D015203:Reproducibility of Results; D012542:Scattering, Radiation
chemical_list: D001647:Bile Acids and Salts; D006027:Glycosides