Derivative Spectroscopic Method and RP-HPLC Method Development and Validation of Levofloxacin hemihydrate

The present work describes the development of a simple, precise and accurate derivative spectroscopic and RP-HPLC method for the estimation of levofloxacin hemihydrate in the tablet dosage form. Levofloxacin hemihydrate showed absorption maxima at 287.36, 287.2 and 296.2nm in zero, first and second-order spectroscopic methods. The RP-HPLC method was optimized by using Orthophosphoric acid: acetonitrile: methanol (50: 20: 30) as solvent at 287nm. The methods showed linearity in the concentration range 1-5 and 2-10 µg/ ml and the correlation coefficient was 0.999 respectively. The method has been validated according to the ICH guidelines. The percentage relative standard deviation was found to be less than 2% in respect of both methods.