Abstract
A rapid and simple high performance liquid chromatographic analytical method is described for the simultaneous determination of norfloxacin and furprofen in rat plasma. Following dichloromethane extraction, the solution was chromatographed in a Vydac anion exchange column using a mobile phase of 0.05 M phosphate buffer (pH = 7.0): acetonitrile (80:20, v/v) at a flow-rate of 1.8 mL/min. The drugs were detected by UV absorption at 278 nm. The total chromatographic analysis time was 10 min. The response was linear, 0.1-5.0 micrograms/mL for norfloxacin and 0.1-3.0 micrograms/mL for furprofen, respectively. This method is useful for pharmacokinetic studies of these compounds and will facilitate detailed investigations into the interactions between quinolones and furprofen.
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