Fig. 6From: Facile synthesis and eco-friendly analytical methods for concurrent estimation of selected pharmaceutical drugs in their solutions: application to quality by design, lean six sigma, and stability studiesa, d ratio spectra of CFZ and PYD using 20 µg/mL of CFZ and 5 µg/mL of PYD as divisors, respectively b, e ratio spectra of CFZ and PYD after subtraction of constant, and c, f zero order spectra of CFZ and PYD after multiplication by the divisorsBack to article page