title: High-performance liquid chromatographic separation of ondansetron enantiomers in serum using a cellulose-derivatized stationary phase and solid-phase extraction.
abstract: R(-)-Ondansetron and S(+)-ondansetron in human serum were resolved and quantified using a stereospecific HPLC method. Each enantiomer and the internal standard prazosin were isolated from serum using a solid-phase extraction procedure on a cyanopropyl column. Recoveries of 97, 96 and 88% were obtained for the R(-)-enantiomer, the S(+)-enantiomer, and the internal standard, respectively. A cellulose-based chiral analytical column (Chiralcel OD) was used with a mobile phase consisting of hexane-95% ethanol-2-propanol-acetonitrile (65:25:10:1, v/v). Linear calibration curves were obtained for each enantiomer in serum in the concentration range 10-200 ng/ml. The limit of quantitation of each enantiomer was 10 ng/ml. The detection limit for each enantiomer in serum using UV detection at 216 nm was 2.5 ng/ml (signal-to-noise ratio of 3).
authors.affiliation: Department of Medicinal Chemistry, College of Pharmacy, University of Georgia, Athens 30602-2352.
authors.forename: J W
authors.initials: JW
authors.lastname: Kelly
authors.forename: L
authors.initials: L
authors.lastname: He
authors.forename: J T
authors.initials: JT
authors.lastname: Stewart
mesh_terms: D002482:Cellulose; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D007202:Indicators and Reagents; D017294:Ondansetron / Q000097:blood*; D011224:Prazosin / Q000097:blood; D012044:Regression Analysis; D013056:Spectrophotometry, Ultraviolet; D013237:Stereoisomerism
chemical_list: D007202:Indicators and Reagents; D017294:Ondansetron; D002482:Cellulose; D011224:Prazosin