title: Modification of an ion-paired high pressure liquid chromatography for ticarcillin in human serum.
abstract: OBJECTIVE
  To develop a new HPLC assay for the clinical pharmacokinetic study of ticarcillin in human.
  
  
  METHODS
  Reverse phase ion-paired HPLC was developed with a Novapak C18 column. The mobile phase consisted of 20% of acetonitrile and 80% of phosphate buffer 10 mmol.L-1 (pH 2.0-2.5) containing tetrapentylammonium bromide of 1 mmol.L-1. The analysis was monitored at 225 nm and the flow rate of the mobile phase was 0.8 mL.min-1. Cefoxitin was used as an internal standard. The sample volume was 200 microL of serum.
  
  
  RESULTS
  The assay was linear in the range of 2-80 mg.L-1. The intrarun coefficients of variation (CV) for a ticarcillin 5 mg.L-1 check sample was 4.2% (n = 10), and 2.7% for a 60 mg.L-1 check sample (n = 10), respectively. The inter-run CV (n = 6) were 1.6% (5 mg.L-1) and 2.3% (60 mg.L-1), respectively. The average recovery of the assay was 96.6%.
  
  
  CONCLUSIONS
  This assay was sensitive, precise, and accurate for evaluating the clinical pharmacokinetics of ticarcillin.
authors.affiliation: Hartford Hospital, CT, USA.
authors.forename: Z
authors.initials: Z
authors.lastname: Zhu
authors.forename: D W
authors.initials: DW
authors.lastname: Xuan
authors.forename: C H
authors.initials: CH
authors.lastname: Nightingale
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D006801:Humans; D010406:Penicillins / Q000097:blood*; D013982:Ticarcillin / Q000097:blood*
chemical_list: D010406:Penicillins; D013982:Ticarcillin