FT-IR SPECTROSCOPIC APPROACH FOR THE QUANTITATIVE ANALYSIS OF FEW COMMERCIAL DRUGS IN BULK AND PHARMACEUTICAL FORMULATIONS

Abstract

Simple, environment-friendly, rapid, accurate and cost effective Fourier Transform Infrared Spectroscopic (FT-IR) methods have been developed for the quantification of Bosentan (BSN), Desloratadine (DSD) and Flunarizine (FNZ) in bulk and marketed formulations. These drugs were estimated by several techniques and a new method has been developed by using FT-IR technique. The methods were developed on the basis of sample concentration influences the intensity of the vibrational bands and linearity is expected between concentration and optical density. The quantity of the drug present in commercial tablets with no interference of the excipients was estimated by applying this proposed method. This method has been validated in terms of LOD, LOQ, precision, accuracy, % RSD, robustness and ruggedness. A factor affecting the absorbance viz., concentration of drug is optimized. The presence of excipients has also been examined and found no significant effect. The calibration curves are found effective for the assessment of pure drug and pharmaceuticals. These curves also can be applied in bulk drug and pharmaceutical industries.