Absorption
Figure 2:Absorption spectra of drug, reagent and complexes: a) azithromycin (767 µg mL-1), BPB (80 µM) and their complex, b) cephalexin monohydrate (3654 µg mL-1), BPB (80 µM) and their complex and c) sparfloxacin (39 µg mL-1), BPB (80 µM) and their complex.