Spectrophotometric Estimation of Tolperisone Hydrochloride and Diclofenac Sodium in Synthetic Mixture by Dual Wavelength Method

Abstract

This method describes simple, sensitive, rapid, accurate, precise and economical derivative spectroscopic method for the simultaneous determination of tolperisone hydrochloride (TOL) and diclofenac sodium (DIC) in bulk and synthetic mixture. In this study, dual wavelength spectroscopic method was used for simultaneous determination of tolperisone hydrochloride and diclofenac sodium using the absorbance difference at two wavelengths. The absorbance differences of 257 nm and 306.20 nm were selected for the estimation of TOL and the absorbance differences of 243.40 nm and 265.40 nm were selected for estimation of DIC. The method was found to be linear (r2>0.999) in the range of 2- 18 μg/ml for tolperisone hydrochloride. The linear correlation was obtained (r2>0.997) in the range of 2- 18 μg/ml for diclofenac sodium. The limit of determination was 0.66 and 0.27 μg/ml for tolperisone hydrochloride and diclofenac sodium respectively. The limit of quantification was 2.00 and 0.83 μg/ml. The method was successfully applied for simultaneous determination of tolperisone hydrochloride and diclofenac sodium in binary mixture.