Spectrophotometric Determination of Captopril and Penicillamine through the Use of Ligand Exchange Complexation Reactions
Saied Belal,
Abdel-Fattah El-Walily,
Omayma Abdel-Razak
et al.
Abstract:Two spectrophotmetric methods based on combined redox - ligand exchange reactions were developed for the determination of captopril and penicillamine in pure form and in their dosage forms. The first method is based on attenuating the absorbance of a ternary complex: silver (I) - bromopyrogallol red - phenanthroline in a buffer solution of pH6-8. The method has the concentration ranges 2-10 µg mL-1 and 0.5-1.75 µg mL-1 for captopril and penicillamine respectively, and the detection limits 7.1 × 10-2 and 5.7 × … Show more
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