title: Liquid-liquid extraction and high-performance liquid chromatography for the determination of a novel antidysrhythmic agent (UK-68,798) in human urine.
abstract: A routine method for the determination of a novel class III antidysrhythmic agent, 1-(4-methanesulphonamidophenoxy)-2-[N-(4-methanesulponamidophen ethyl)- N-methylamino]ethane, in human urine has been developed. The method involves solvent extraction followed by high-performance liquid chromatography on an unmodified silica column with ultraviolet detection. Despite a low recovery of drug through the three-stage extraction procedure a reliable assay with high precision (coefficient of variation less than 6%) and a limit of determination of 2.5 ng/ml was achieved. The method has been applied to the analysis of samples following single oral and intravenous doses of 1-12.5 micrograms/kg of the drug to human volunteers.
authors.affiliation: Department of Drug Metabolism, Pfizer Central Research, Sandwich, Kent, UK.
authors.forename: D K
authors.initials: DK
authors.lastname: Walker
authors.forename: D A
authors.initials: DA
authors.lastname: Smith
authors.forename: D A
authors.initials: DA
authors.lastname: Stopher
mesh_terms: D000889:Anti-Arrhythmia Agents / Q000652:urine*; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D010627:Phenethylamines / Q000652:urine*; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet; D013449:Sulfonamides / Q000652:urine*
chemical_list: D000889:Anti-Arrhythmia Agents; D010627:Phenethylamines; D013449:Sulfonamides; C063533:dofetilide