ANALYTICAL CHEMISTRY OF ZIRCONIUM. PART III. SALICYLIC AND PHENOXY ACETIC ACIDS

Two reagents, salicylic acid and phenoxyacetic acid, have been described for the separation and estimation of zirconium from many other associated elements. Titanium and quadrivalent cerium interfere. Thorium is removed in a double precipitation. Iron may be removed in a double precipitation ordinarily or in a single precipitation by complexing with excess of ammonium sulpho. cyanide. Other divalent and trivalent elements present no difficulty. Salicylic acid acts best in solu­tions of zirconium 0.18N with HCI and phenoxyacetic acid, 0.24N with HCI.