Fig. 3From: Simultaneous spectrophotometric determination of recombined sofosbuvir, ledipasvir and paracetamol together as commonly repurposed drugs for COVID-19 treatmentFirst derivative spectra showing zero-crossing of SOF 10 µg/mL (black curve) at 247.2 nm and PAR 10 µg/mL (blue curve) at 260.8 nmBack to article page