title: Liquid chromatographic analysis of penem antibiotic FCE22101 in biological fluids with a liquid-liquid extraction procedure.
abstract: A sensitive high-performance liquid chromatographic method has been developed for the determination of penem antibiotic FCE22101 in plasma and urine. FCE22101 was extracted from plasma and urine with ethyl acetate. After evaporating, the sample solutions were analyzed by a reversed-phase high-performance liquid chromatographic system using a two-sided bracketing injection technique. The determination limit of FCE22101 was 5 ng/ml in plasma. Analysis of the spiked plasma samples demonstrated the good accuracy and precision of the method. The proposed method improved from five- to ten-fold on the analytical sensitivity in comparison with the most commonly ultrafiltration method.
authors.affiliation: Analytical Research Laboratory, Tanabe Seiyaku Co., Ltd., Osaka, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Matsuoka
authors.forename: T
authors.initials: T
authors.lastname: Maki
authors.forename: K
authors.initials: K
authors.lastname: Banno
authors.forename: T
authors.initials: T
authors.lastname: Sato
mesh_terms: D000085:Acetates / Q000737:chemistry; D000284:Administration, Oral; D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000737:chemistry / Q000378:metabolism*; D002138:Calibration; D015780:Carbapenems / Q000032:analysis* / Q000097:blood / Q000737:chemistry / Q000652:urine; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D007769:Lactams; D016014:Linear Models; D009994:Osmolar Concentration; D011355:Prodrugs / Q000008:administration & dosage / Q000737:chemistry / Q000378:metabolism; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013997:Time Factors
chemical_list: D000085:Acetates; D000900:Anti-Bacterial Agents; D015780:Carbapenems; D007769:Lactams; D011355:Prodrugs; C007650:ethyl acetate; C041561:FCE 22891; C040033:ritipenem