Abstract
An isotope dilution assay for the specific determination of 14C-labelled oxprenolol and nine of its metabolites in the same biological sample is described. After addition of unlabelled carriers to the sample, oxprenolol and the metabolites were isolated by base- and acid-specific extraction and separated by normal-phase high-performance liquid chromatography using two different mobile phases. Quantitation of the various peaks was performed by on-line ultraviolet detection at 275 nm and off-line radiometry by liquid scintillation counting. Endogenous compounds and unknown metabolites did not interfere in the assay. The analysis of rat and dog blood, plasma and urine samples spiked with [ 14C]oxprenolol hydrochloride, showed mean recoveries between 98.7 and 99.8%. The assay was used to investigate the metabolic fate of [ 14C]oxprenolol in the dog. Analyses of blood and urine demonstrated the quantitative significance of the various metabolites in the biotransformation of oxprenolol.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
