title: An improved high-pressure liquid chromatographic assay for secobarbital in serum.
abstract: A high-pressure liquid chromatographic method for the analysis of secobarbital in serum was developed. Secobarbital was extracted from buffered serum (pH 5.5) with a solvent mix of hexane-ether-n-propanol. 5-(4-Methylphenyl)-5-phenylhydantoin was added as an internal standard. Separation of secobarbital and internal standard from serum constituents and other drugs was achieved on a 5-mum C-18 reversed-phase column using an acetonitrile-phosphate buffer (pH 4.4) mobile phase. The eluent was monitored at 195 nm. The sensitivity limit of the assay was approximately 0.02 microgram/ml with 0.5 ml of serum sample. The application of this method to pharmacokinetic studies in pediatric patients was demonstrated.
mesh_terms: D002675:Child, Preschool; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D005260:Female; D006801:Humans; D007700:Kinetics; D012631:Secobarbital / Q000097:blood*
chemical_list: D012631:Secobarbital