Method Development and Validation for the Estimation of Etizolam and Propranolol Hydrochloride in bulk and Combined Dosage Forms by Simultaneous and Derivative Spectroscopic Methods

Accurate, simple, sensitive and rapid economic UV spectroscopic methods were developed for the estimation of Etizolam and Propranolol Hydrochloride in bulk and combined dosage form. The present study deals with the UV spectroscopic method development and validation for the Simultaneous Equation method and First Derivative method of Etizolam and Propranolol Hydrochloride in bulk and combined dosage form at determined wavelength of Etizolam and Propranolol Hydrochloride at 244nm and 288nm for Simultaneous Equation method and 234nm and 289nm for First Derivative Method. The linearity range for Etizolam and Propranolol Hydrochloride was 1-5µg/ml and 10-50µg/ml, and exhibit good correlation coefficient of Etizolam and Propranolol Hydrochloride was 0.9877 and 0.9977 for Simultaneous Equation method and 0.9872 and 0.9977 for First Derivative method, respectively and excellent mean recovery (98-102%). The precision was found to be within limit (%RSD <2). Comparatively First Derivative method is more sensitive than Simultaneous Equation method. The methods were validated statistically and parameters like linearity, precision, accuracy, specificity and assay was studied according to ICH guidelines and can be applicable in determination of both drugs in routine quality control analysis of drugs in bulk and combined dosage form.