title: Reversed-phase high-performance liquid chromatographic identification of lutein and zeaxanthin stereoisomers in bovine retina using a C30 bonded phase.
abstract: An efficient reversed-phase high-performance liquid chromatographic assay with ultraviolet detection at 450 nm for simultaneous determination of lutein and zeaxanthin stereoisomers in bovine retina is described. The procedure involves rapid and careful one-step hexane extraction of the carotenoids from the homogenized liquid and enrichment by on-line solid phase extraction on a polystyrene cartridge. The substances were eluted at a flow rate of 1 ml/min with acetone-water (85:15, v/v) on a C30 reversed-phase column. C30 phases exhibit superior shape selectivity for the separation of carotenoid stereoisomers compared with conventional C18 phases. For comparison a mixture of iodine-isomerized lutein and zeaxanthin standards was separated.
authors.affiliation: University of Tübingen, Institute of Organic Chemistry, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Dachtler
authors.forename: K
authors.initials: K
authors.lastname: Kohler
authors.forename: K
authors.initials: K
authors.lastname: Albert
mesh_terms: D000818:Animals; D002417:Cattle; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D014975:Lutein / Q000032:analysis*; D012160:Retina / Q000737:chemistry*; D013237:Stereoisomerism; D024341:Xanthophylls; D065146:Zeaxanthins; D019207:beta Carotene / Q000031:analogs & derivatives* / Q000032:analysis
chemical_list: D024341:Xanthophylls; D065146:Zeaxanthins; D019207:beta Carotene; D014975:Lutein