Development of a solvent extraction system with 4-heptylaminopyridine for the selective separation of platinum(<scp>iv</scp>) from catalysts, anticancer injections and water samples

In this paper, the solvent extraction of platinum(<sc>iv</sc>) from ascorbate media (0.007 M) has been studied by equilibrating the aqueous phase (pH 1.5) with 10 mL of 0.06 M 4-heptylaminopyridine (4-HAP), as a novel anion exchanger, diluted in xylene for 2 min.