Content Determination of Gatifloxacin in Human Plasma by HPLC / 中国药房

OBJECTIVE: To establish a HPLC method for content determination of gatifloxacin in human plasma.METHODS: The Analytical column was C18,the mobile phase consisted of acetonitrile-30mmol/L ammonium acetate-triethylamine-orthophosphoric acid (20∶80∶1.0∶0.7) with a flow rate of 1.0ml/min,the detection was performed at UV 294nm.RESULTS: The calibration curve was linear in the concentrations ranging from 0.1 to10.0?g /ml (r=0.9 992).The detection limit was 0.05?g/ml.The intraday RSD was less than 8% and interday RSD was less than 10%.The average recovery was (101.67?3.06)%.CONCLUSION: The method is simple, sensitive, accurate and suitable for determination of gatifloxacin in human plasma and pharmacokinetic study.