Direct complexometric determination of zirconium(IV) in relation to polymerisation

Abstract

Polymerisation and de-polymerisation of zirconium on boiling and ageing in various concentrations of nitric, hydrochloric and sulphuric acids have been systematically studied and the optimum experimental conditions for complete de-polymerisation and titration of zirconium ions worked out. A simple and accurate method is described for the direct titration of zirconium ions with EDTA. Most of the elements, other than phosphorus and fluorine, do not interfere. The method has been successfully used for determining zirconium in zircon and commercial zirconium dioxide.