VALIDATED RP-HPLC METHOD FOR DETERMINATION OF ENZALUTAMIDE IN BULK DRUG AND PHARMACEUTICAL DOSAGE FORM

Novel, isocratic reversed phase high performance liquid chromatography method was developed and validated for the determination of enzalutamide (EZA) in bulk drug and pharmaceutical formulation. Efficient separation was achieved on PrincetonSPHER C18 100A, 5μ (250×4.6 mm) under the isocratic mode of elution using acetonitrile: water (80:20) % V/V as a mobile phase pumped in to the column at flow rate 1.0 mL/min. The effluent was monitored at 237.0 nm using UV detector. EZA was eluted in the given mobile phase at retention time (tR) of 3.2 minutes. The standard calibration curve was linear over the concentration range 10 - 60 μg/mL with correlation coefficient 0.997. The method was validated for accuracy, precision, sensitivity, robustness, ruggedness and all the resulting data treated statistically. The system suitability parameters like retention time, theoretical plates, tailing factor, capacity factor were found within the limit.