title: Stereospecific high-performance liquid chromatographic assay of metoprolol.
abstract: A valid, sensitive high-performance liquid chromatographic technique is reported for the separation of the two enantiomers of metoprolol in human plasma. The procedure involves pre-column derivatization with the homochiral reagent S-(+)-1-(1-naphthyl)ethyl isocyanate. Once formed, the diastereomers are separated using normal-phase high-performance liquid chromatography. Fluorescence detection (220 nm excitation; no emission filter) was utilized, resulting in baseline resolution (Rs greater than 1.5). The peaks corresponding to metoprolol enantiomers were free from interference throughout the examined range of 5-500 ng/ml; accuracy and precision were within approximately 10%. Analysis of a plasma sample collected from a healthy volunteer demonstrated that the assay is applicable to clinical studies.
authors.affiliation: Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Canada.
authors.forename: M M
authors.initials: MM
authors.lastname: Bhatti
authors.forename: R T
authors.initials: RT
authors.lastname: Foster
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D008790:Metoprolol / Q000097:blood*; D013237:Stereoisomerism
chemical_list: D008790:Metoprolol