Qbd Based RP-HPLC Method Development and Validation for Simultaneous Estimation of Amlodipine Besylate and Lisinopril Dihydrate in Bulk and Pharmaceutical Dosage Form

The objective of this experiment was to develop and validate a simple, robust, and accurate QbD based Reverse-Phase High-Performance Liquid Chromatography method for Simultaneous estimation of Amlodipine besylate and Lisinopril dihydrate in bulk and Pharmaceutical Dosage form. A box-Behnken design was employed for optimizing the mobile phase, flow rate and pH of buffer, the optimized chromatographic conditions were Phosphate buffer: Methanol (25: 75 v/v), pH of buffer: 6.5 and flow rate: 1mL/min. Furthermore formulation injected and observed that the additives do not interfere with the peak of Amlodipine besylate and Lisinopril dehydrate. Both drugs are well resolved and Retention times were found to be 2.332 min and 3.584 min respectively. Linearity was observed in the concentration range of 10 μg to 50 μg/mL (r2=0.999). The accuracy range was 99.75 to 100.04%. Intra-day and Inter-day precision was found to be less than 2% RSD. The proposed method was useful for the best analysis of Amlodipine besylate and Lisinopril dihydrate in Bulk, pharmaceutical dosage forms and was successfully applied to routine analysis.