title: Determination of ticarcillin in human plasma and in urine by reversed-phase LC.
abstract: A liquid chromatographic assay for ticarcillin (ticar.) in plasma and urine is described. For analysis, the internal standard cefoperazone (cfp) is dissolved in acetonitrile, which is used for precipitating the protein. The supernatant is evaporated, reconstituted in running mobile phase and injected directly onto the reversed-phase C18 column, with detection at 205 nm. The mobile phase is composed of water-acetonitrile-o-phosphoric acid-tetramethylammonium chloride (TMA). Coefficients of variation for reproducibility were in the range of 2.2-15.5% for extra-low, low, medium and high controls. Limits of detection were 0.5 microgram ml-1 for plasma and 1 microgram ml-1 for urine. No interference from other cephalosporins or other antibiotics was noted. This liquid chromatographic assay is simple, accurate, requires no extraction and overcomes previous problems related to the drug's peak splitting due to isomerization.
authors.affiliation: Division of Clinical Pharmacy, School of Pharmacy, University of California, San Francisco 94143-0622, USA.
authors.forename: G
authors.initials: G
authors.lastname: La Follette
authors.forename: A L
authors.initials: AL
authors.lastname: Jayewardene
authors.forename: A K
authors.initials: AK
authors.lastname: Seneviratne
authors.forename: E T
authors.initials: ET
authors.lastname: Lin
authors.forename: J G
authors.initials: JG
authors.lastname: Gambertoglio
mesh_terms: D002138:Calibration; D002853:Chromatography, Liquid / Q000379:methods; D004355:Drug Stability; D006801:Humans; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013982:Ticarcillin / Q000097:blood* / Q000652:urine*
chemical_list: D013982:Ticarcillin