Abstract
Synthetic mixtures of theophylline and sodium acetate, salicylate, and glycinate are titrated with acetous perchloric acid using a potentiometer for the detection of the end points. Differentiation of the equimolecular mixtures could be realized in the solvent mixture containing benzene-acetic anhydride-acetic acid (18:4:1). The method is applied to assay theophylline combinations and their tablets. The results are compared to those obtained by official methods. Synthetic mixtures of theophylline and sodium acetate, salicylate, and glycinate are titrated with acetous perchloric acid using a potentiometer for the detection of the end points. Differentiation of the equimolecular mixtures could be realized in the solvent mixture containing benzene-acetic anhydride-acetic acid (18:4:1). The method is applied to assay theophylline combinations and their tablets. The results are compared to those obtained by official methods.
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