title: Development and validation of an ion-pair reversed-phase high-performance liquid chromatographic method for the separation of phosphonodipeptides.
abstract: The objective of this research was to develop a rapid, sensitive and reliable method for the separation of phosphonodipeptide prodrugs and parent compounds to facilitate the evaluation of cell permeation using in vitro cell culture models. Separation was accomplished isocratically within 10.0 min using a C18 (150x4.6 mm I.D., 3 microm) reversed-phase column. The mobile phase consisted of 5 mM tetrahexyl ammonium (ion-pair reagent) in 0.02 M phosphate buffer pH 6.5-acetonitrile (48.5:51.5, v/v). The flow-rate was 1.1 ml/min with detection at 221 nm. The standard curves were linear (r2>0.999) over the concentration range 1-100 microM. The method was reliable and reproducible, with the limit of quantitation being 1 microM (25 ng on column).
authors.affiliation: Department of Pharmacokinetics and Drug Metabolism, Parke-Davis Pharmaceutical Research, Ann Arbor, MI 48105, USA.
authors.forename: N
authors.initials: N
authors.lastname: Surendran
authors.forename: C J
authors.initials: CJ
authors.lastname: Stankovic
authors.forename: B H
authors.initials: BH
authors.lastname: Stewart
mesh_terms: D016475:3T3 Cells; D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004151:Dipeptides / Q000032:analysis*; D051379:Mice; D063065:Organophosphonates / Q000032:analysis*; D011355:Prodrugs / Q000032:analysis*; D000644:Quaternary Ammonium Compounds; D015203:Reproducibility of Results
chemical_list: D004151:Dipeptides; D063065:Organophosphonates; D011355:Prodrugs; D000644:Quaternary Ammonium Compounds; C055292:tetrahexylammonium