Simultaneous estimation of amlodipine besylate and nebivolol hydrochloride in tablet dosage forms by reverse phase-highperformance liquid chromatographic using ultraviolet detection
Background: The present study aimed to develop and validate the simultaneous estimation of amlodipine and nebivolol in tablet dosage forms. Materials and Methods: An isocratic reversed phase high-performance liquid chromatographic (HPLC) method with ultraviolet detection at 268 nm has been developed for the determination of amlodipine besylate (ADB) and nebivolol hydrochloride in dosage formulation. Results: Good chromatographic separation was achieved by using a stainless steel analytical column, the Lichrospher ODS RP-18 column (250 × 4 mm), particle size 5 μm. The system was operated at ambient temperature (25 ± 2°C) using a mobile phase consisting of acetonitrile (ACN) and a phosphate buffer (pH 3.0), mixed in a ratio of 40 : 60 at a flow rate of 0.8 ml/minute. The slope, intercept, and correlation coefficient were found to be 8818.2, - 18159, and 0.9993 for amlodipine and 9048.7, 108595, and 0.9998 for nebivolol, respectively. The proposed method was validated for its specificity, linearity, accuracy, and precision. Conclusion: The method was found to be suitable for the quality control of amlodipine besylate and nebivolol hydrochloride simultaneously in a bulk drug as well as in a formulation.