New Spectrophotometric and Conductometric Methods for Macrolide Antibiotics Determination in Pure and Pharmaceutical Dosage Forms Using Rose Bengal

Figure 1

Absorption spectra for (a) the reaction of 13 𝜇g/mL azithromycin dihydrate with 0.5 mL Cu(II) chloride 0.3% w/v and 0.2 mL 0.3% w/v rose bengal, (b) 13 𝜇g/mL azithromycin dihydrate with 0.2 mL rose bengal 0.3% w/v, (c) 13 𝜇g/mL azithromycin dihydrate with 0.5 mL Cu(II) chloride 0.3% w/v, (d) 0.2 mL rose bengal 0.3% w/v and 0.5 mL Cu(II) chloride 0.3% w/v, (e) 0.2 mL rose bengal 0.3% w/v, and (f) 0.5 mL Cu(II) chloride 0.3% w/v.