Fig. 5From: Eco-friendly analytical methods for the determination of compounds with disparate spectral overlapping: application to antiviral formulation of sofosbuvir and velpatasvira Absorption spectra of the colored reaction product obtained from VP, SF, and SF-VP mixture reaction with 0.2% w/v NBD-Cl. b Fluorescence excitation (1) and emission (2) spectra of the reaction product of VP (5 μg/mL) with 0.2% w/v NBD-Cl. c Absorption spectra of the colored reaction product obtained from VP, SF, and SF-VP mixture reaction with MBTH in presence of the oxidant Fe(III) chlorideBack to article page