No abstract

The proposed method is a simple, accurate, precise, specifi c and rapid method for the simultaneous estimation of gatifl oxacin and ornidazole in bulk and tablet formulations. A column in isocratic mode, with a mobile phase consisting of acetonitrile: 0.025 M potassium dihydrogen phosphate buffer (50:50 v/v) with 0.5% v/v of triethylamine and its pH adjusted to 3.0 with glacial acetic acid were used. The fl ow rate was set at 1.0 ml/min and UV detection was carried out at 300 nm. The retention time of gatifl oxacin and ornidazole were 2.89±0.017 min and 4.21±0.022 min, respectively. Linearity of gatifl oxacin and ornidazole were found in the range of 2-24 µg/ml and 5-60 µg/ml, respectively. The developed HPLC method was extended for dissolution studies. The dissolution testing was performed at 50 rpm and 100 rpm in 0.1 N HCL as dissolution medium by paddle method.

Three simple, accurate and economic methods multicomponent, two wavelength and simultaneous equations using area under curve have been described for the simultaneous determination of gatifloxacin and ornidazole in tablet dosage form. Gatifloxacin shows absorption maximum at 287.5 nm and ornidazole shows absorption maximum at 319.5 nm in distilled water. Beer's law was obeyed in the concentration range of 2-20 µg/ml for gatifloxacin and 10-60 µg/ml for ornidazole. The methods allow rapid analysis of binary pharmaceutical formulation with accuracy. Results of analysis for three methods were validated statistically and by recovery studies and were found satisfactory.