A new, simple, rapid, selective, precise and accurate reverse phase high performance liquid chromatography assay has been developed for simultaneous estimation of Bilastine, and Montelukast in tablet formulations. The separation was achieved by using Phenomenax Kinetex XB C-18 column (150 x 4.6mm, 5 .) using mobile phase Methanol: 0.1% TFA water (80:20). Injection volume was 10µl. The flow rate was 1.0mL.min-1 and the separated drugs were detected using UV detector at the wavelength of 270nm. The retention time of Bilastine and Montelukast was noted to be 1.27, and 4.86 respectively, indicative of rather shorter analysis time. The method was validated as per ICH guidelines. The proposed method was found to be accurate, reproducible, and consistent. It was successfully applied for the analysis of these drugs in marketed formulations and could be effectively used for the routine analysis of formulations containing any one of the above drugs, or a combination, without any alteration in the chromatographic conditions.

Objective: A new, simple, sensitive, precise, reproducible UV visible spectrophotometric method was developed for the estimation of Carbimazole in Tablet dosage form. Methods: The UV spectrum of Carbimazole in methanol and distilled water (30:70) showed λ max at 289.6nm. Beer’s law is valid in the concentration range of 10-50µg/ml. This method was validated for linearity, accuracy, precision, ruggedness and robustness. Results: The method has demonstrated excellent linearity over the range of 10-50µg/ml with the regression equation y = 0.0232x + 0.0466, and regression coefficient i.e, r2= 0.9992 moreover, the method was found to be highly sensitive with LOD (1.818µg/ml) and LOQ (5.509µg/ml). Conclusion: From the results it can be concluded that the given method can be successfully applied for assay of Carbimazole in Tablet dosage form.

UV spectroscopic method was developed for the estimation of Dolutegravir in bulk and Formulation.The UV spectrum of Dolutegravir in methanol and water mixture showed λ max at 254nm. Beer’s law is valid in the concentration range of 10-50µg/ml. This method was validated for linearity, accuracy, precision, LOD and LOQ. The method has demonstrated excellent linearity over the range of 10-50µg/ml with regression equation y = 0.030x + 0.008 and regression correlation coefficient r2= 0.998. Moreover, the method was found to be highly sensitive with LOD (2.056μg/ml) and LOQ (6.230μg/ml). Depending on results the given method can be successfully applied for assay of Dolutegravir in formulation.

A novel UV-Spectroscopy method was developed and validated for the estimation of L-glutathione in bulk and dosage form with congo red. The wavelength at which L-glutathione and congo red mixture product showed maximum absorption at 568nm in distilled water. The developed method range was found to be10-90µg/ml. The developed method validated for linearity, precision, range, limit of detection, the limit of quantification, robustness, specificity, system suitability. The regression equation was found to be y = 0.0045x + 0.121 with correlation coefficient R² = 0.9983. The limit of detection and the quantification limit was 5.05 µg/ml and 15.32 µg/ml respectively. The developed method was found to be linear, precise, robust, economical for the evaluation of L-glutathione in bulk and dosage form.