Determination of citrate as its iron(III) complex by differential pulse polarography

Abstract

A method for determining citrate as its complex with iron(III) by differential pulse polarography is described. The method is sensitive to 5 µg ml^–1 of citrate, without any interference from equimolar propan-2-onedicarboxylate and propenetricarboxylate ions and 10% of oxalate and tartrate ions. The limits of error in citrate concentrations determined by the proposed method are better than ±2.5%.

The feasibility of determining oxalate, succinate and tartrate by means of differential pulse polarography was also explored and the method was found to be applicable to the determination of oxalate.