Objective: To develop a simple, rapid, sensitive, precise, accurate, economical and validated reverse phase high performance liquid chromatographic (RP-HPLC) method for the estimation of lurasidone hydrochloride in tablet dosage form.Methods: The chromatographic separation was carried out on a prontosil C18, AQ (100 mm×4.6mm, 3µm) column. A mixture of phosphate buffer (pH 3.0): acetonitrile (ACN) (55:45v/v) was used as a mobile phase. Flow rate of 1.0 ml/min and 10 μl injection volume was used for the assay. PDA detector was used and the detection wavelength was 230 nm. The retention time (RT) of lurasidone hydrochloride was found to be 4.505 ± 0.01 min. The method was validated according to the ICH guidelines.Results: The calibration curve for lurasidone hydrochloride was linear with correlation coefficient value 0.999 in the concentration range of 25-125%. Specificity, accuracy (% mean recovery, 99.08%), precision, detection limits, robustness (%RSD˂2) and system suitability were found to be within the limits. Degradation studies were performed under different stressed conditions and the results of degradation studies reveals that the developed method was stable.Conclusion: The developed method was simple, reliable, economical and stable and it can be applied for the routine quality control analysis of lurasidone hydrochloride in tablet dosage forms.
Phenylephrine and fexofenadine are widely used products for common cold and allergic conditions. In this study, a simple, reliable, sensitive and economical Ultra Performance Liquid Chromatographic (UPLC) method was developed and validated for the simultaneous estimation of phenylephrine and fexofenadine in suspension dosage form. Efficient chromatographic separation was achieved on Acquity UPLC HSS C18 x 1.8μm column with mobile phase consisting of orthophosphoric acid buffer (pH = 2.8) and acetonitrile (55:45% v/v) at a flow rate of 0.3ml.min-1 and 1μl injection volume. TUV detector was used and detection wavelength was 272nm. The retention times of phenylephrine and fexofenadine were found to be 1.347 and 1.536 ± 0.01 mins respectively. The percentage recoveries of phenylephrine and fexofenadine were 99.93% and 99.31% respectively. The relative standard deviation for assay was found to be <2. The detection and quantification limits were found to be 0.04 and 0.13μg/ml for phenylephrine and 0.21 and 0.65μg/ml for fexofenadine respectively. Thus, the developed UPLC method was simple, rapid, sensitive and economical and it can be applied for the routine quality control analysis of combined dosage forms in quality control laboratories and in pharmaceutical industries.
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