title: Determination of a new oral cephalosporin, S-1090, in human plasma and urine by direct injection high-performance liquid chromatography with ultraviolet detection and column switching.
abstract: Direct injection high-performance liquid chromatographic (HPLC) methods with column switching and UV detection were developed for the rapid and accurate determination of S-1090 in human plasma and urine. An internal-surface reversed-phase pre-column and a C18 analytical column were used for the plasma assay. Two pre-columns packed with cyano and phenyl materials and a C18 analytical column were used for the urine assay. The calibration curves for plasma and urine assays were linear in the ranges 0.09-9 microg/ml and 0.5-100 microg/ml of S-1090, respectively. The relative standard deviations for plasma and urine assays were less than 6% with low relative errors. The established HPLC methods were demonstrated to be useful for clinical pharmacokinetic studies after oral administration of S-1090.
authors.affiliation: Shionogi Research Laboratories, Shionogi & Co., Ltd., Osaka, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Fujitomo
authors.forename: T
authors.initials: T
authors.lastname: Nagaoka
authors.forename: I
authors.initials: I
authors.lastname: Nishino
authors.forename: T
authors.initials: T
authors.lastname: Umeda
mesh_terms: D000284:Administration, Oral; D002138:Calibration; D002511:Cephalosporins / Q000097:blood / Q000493:pharmacokinetics* / Q000652:urine; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet
chemical_list: D002511:Cephalosporins; C098102:S 1090