title: Determination of a new proton pump inhibitor, YH1885, in human plasma and urine by high-performance liquid chromatography.
abstract: A high-performance liquid chromatographic method was developed for the determination of a new proton pump inhibitor, YH1885 (I), in human plasma and urine, and rat blood and tissue homogenate using fenticonazole as an internal standard. The sample preparation was simple: a 2.5 volume of acetonitrile was added to the biological sample to deproteinize it. A 50-microliter aliquot of the supernatant was injected onto a C8 reversed-phase column. The mobile phase employed was methanol-0.005 M tetrabutylammonium dihydrogenphosphate (77:23, v/v), and it was run at a flow-rate of 1.0 ml/min. The column effluent was monitored using an ultraviolet detector at 270 nm. The retention times for I and the internal standard were 9.0 and 10.3 min, respectively. The detection limits for I in human plasma and urine, and in rat tissue homogenate (including blood) were 50, 100 and 100 ng/ml, respectively. The coefficients of variation of the assay (within- day and between-day) were generally low (below 8.84%) for human plasma and urine, and for rat tissue homogenate. No interferences from endogenous substances were found.
authors.affiliation: College of Pharmacy, Seoul National University, South Korea.
authors.forename: K S
authors.initials: KS
authors.lastname: Han
authors.forename: H C
authors.initials: HC
authors.lastname: Choi
authors.forename: J K
authors.initials: JK
authors.lastname: Yoo
authors.forename: J W
authors.initials: JW
authors.lastname: Lee
authors.forename: M G
authors.initials: MG
authors.lastname: Lee
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D007546:Isoquinolines / Q000097:blood* / Q000652:urine*; D008297:Male; D054328:Proton Pump Inhibitors; D011744:Pyrimidinones / Q000097:blood* / Q000652:urine*; D051381:Rats; D017207:Rats, Sprague-Dawley; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet; D044005:Tetrahydroisoquinolines
chemical_list: D007546:Isoquinolines; D054328:Proton Pump Inhibitors; D011744:Pyrimidinones; D044005:Tetrahydroisoquinolines; C108798:YH 1885