RESUMO
OBJECTIVE:To establish a method for the simultaneous determination of ornidazole and dexamethasone sodium phosphate in Compound ornidazole film. METHODS:HPLC was performed on the column of Inertsil ODS-3 with mobile phase of methanol-20 mmol/L phosphate buffer(pH was adjusted to 7.40 with glacial acetic acid)(55∶45,V/V)at a flow rate of 1.0 ml/min, column temperature was 30 ℃,detection wavelength was 242 nm and volume injection was 10 μl. RESULTS:The linear range were 1-100μg/ml for both ornidazole(r=0.999 7)and dexamethasone sodium phosphate(r=0.999 9);RSDs of precision,stabili-ty and reproducibility tests were lower than 2.0%;recoveries were 96.50%-99.80%(RSD=1.02%,n=9) and 96.50%-99.60%(RSD=0.99%,n=9). CONCLUSIONS:The method is specific with good precision and stability and high accuracy,and can be used for the simultaneous determination of ornidazole and dexamethasone sodium phosphate in Compound ornidazole film.