title: Enantioselective determination of oxprenolol and its metabolites in human urine by cyclodextrin-modified capillary zone electrophoresis.
abstract: A stereospecific capillary electrophoresis assay for oxprenolol enantiomers and their basic metabolites in human urine has been developed using hydroxypropyl-beta-CD as a chiral selector in the mobile phase. The bioassay method has been validated and the detection limit from spiked urine samples is 0.2 micrograms/ml. The calibration curves are linear from 0.4 to 16 micrograms/ml. Extraction recovery ranged from 84.7 to 96.4% for all the compounds studied. The influence of various parameters on the chiral separation of oxprenolol and its basic metabolites have been investigated. Urinary excretion profiles of oxprenolol enantiomers and those of two metabolites have also been studied, following a single oral dose of racemic oxprenolol.
authors.affiliation: INRS-Santé, Université du Québec, Pointe-Claire, Canada.
authors.forename: F
authors.initials: F
authors.lastname: Li
authors.forename: S F
authors.initials: SF
authors.lastname: Cooper
authors.forename: S R
authors.initials: SR
authors.lastname: Mikkelsen
mesh_terms: D002138:Calibration; D003505:Cyclodextrins; D019075:Electrophoresis, Capillary / Q000379:methods* / Q000706:statistics & numerical data; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010096:Oxprenolol / Q000737:chemistry / Q000302:isolation & purification / Q000652:urine*; D012044:Regression Analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013237:Stereoisomerism
chemical_list: D003505:Cyclodextrins; D010096:Oxprenolol