Fig. 2From: Analysis of paracetamol, pseudoephedrine and cetirizine in Allercet Cold® capsules using spectrophotometric techniquesa Zero-order, b first derivative absorption spectra of 20.00, 600.0 and 20.0 µg mL−1 of PAR (……), PSE (- - - -) and CET (—), respectivelyBack to article page