Fig. 4From: Two novel UPLC methods utilizing two different analytical columns and different detection approaches for the simultaneous analysis of velpatasvir and sofosbuvir: application to their co-formulated tabletTypical chromatogram of a laboratory prepared mixture of VPS (10 ng/mL) and SFV (40 ng/mL) under the described chromatographic conditions (Method 2 A and B). a Studied drugs in the mobile phase utilizing column A. b Studied drugs in the mobile phase utilizing column BBack to article page