Simple Atomic Absorption Spectroscopic and Spectrophotometric Methods for Determination of Pioglitazone Hydrochloride and Carvedilol in Pharmaceutical Dosage Forms

Figure 3

Absorption spectra of (a) the reaction of 50 μgmL⁻¹ PGZ-HCl with 0.3 mL of 3.3×10⁻³ M bismuth subnitrate and 0.5 mL of 0.5 M potassium iodide, (b) 0.3 mL of 3.3×10⁻³ M bismuth subnitrate and 0.5 mL of 0.5 M potassium iodide, and (c) 50 μgmL⁻¹ PGZ-HCl against methylene chloride.