Analytical Method Development and Validation for Velpatasvir and Sofosbuvir in Combined Dosage Form by RP-HPLC

Kaki Lily Grace^1*, Gope Edward Raju², Vaddi Lakshmi Priya³, Doonaboyina Raghava⁴, Kavala Nageswara Rao⁵
Department of Pharmaceutical Analysis, K.G.R.L College of Pharmacy, Bhimavaram-534201, A.P, India

Abstract
High performance liquid chromatography is at present one of the most sophisticated tool of the analysis. The estimation of Velpatasvir   and Sofosbuvirwas done by RP-HPLC. The Phosphate buffer was p^H3.0 and the mobile phase was optimized with consists of Methanol: Phosphate buffer mixed in the ratio of 70:30 % v/ v. Inertsil C₁₈ column  C18 (4.6 x 150mm, 5mm) or equivalent chemically bonded to porous silica particles was used as stationary phase.The detection was carried out using UV detector at 260 nm. The solutions were chromatographed at a constant flow rate of 0.8 ml/min. the linearity range of Velpatasvir and Sofosbuvir were found to be from 100-500 mg/mlof Velpatasvirand 1-5mg/ml ofSofosbuvir. Linear regression coefficient was not more than 0.999.The values of % RSD are less than 2% indicating accuracy and precision of the method. The percentage recovery varies from 98-102% of Velpatasvirand Sofosbuvir. LOD and LOQ were found to be within limit.The results obtained on the validation parameters met ICH and USP requirements .it inferred the method found to be simple, accurate, precise and linear. The method was found to be having suitable application in routine laboratory analysis with high degree of accuracy and precision.
Keywords: Methanol: Phosphate buffer, Inertsil C18 column, Velpatasvir and Sofosbuvir, RP-HPLC.