Liquid-chromatographic determination of ciprofloxacin in serum and urine

D. E. Nix, J. M. De Vito, J. J. Schentag

Research output: Contribution to journalArticlepeer-review

66 Scopus citations


We describe the liquid-chromatographic determination of ciprofloxacin in patients' serum and urine. Serum samples were prepared by precipitating protein with perchloric acid. Urine samples were diluted 100-fold with mobile phase. The mobile phase, consisting of pH 3 phosphate buffer/acetonitrile/methanol (81/5/14, by vol), was pumped through a μBondapak C18 reversed-phase column at 1.5 mL/min. Fluorescence of the effluent was monitored, at wavelengths for excitation and emission of 270 and 440 nm, respectively. Standard curves were linearly related to concentration from 0.08 to 10 mg/L for serum, 1 to 20 mg/L for urine. The procedure was evaluated in a clinical setting to determine its usefulness in studying the pharmacokinetics of ciprofloxacin in patients with concurrent diseases and receiving multiple drug therapies.

Original languageEnglish (US)
Pages (from-to)684-686
Number of pages3
JournalClinical chemistry
Issue number5
StatePublished - 1985

ASJC Scopus subject areas

  • Clinical Biochemistry
  • Biochemistry, medical


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