ICP-OES DETERMINATION OF TRACES OF RU, AU, V AND TI PRECONCENTRATED AND SEPARATED BY A NEW POLY(EPOXY-MELAMINE) CHELATING RESIN FROM SOLUTIONS

A new poly(epoxy-melamine) chelating resin is synthesized from epoxy r esin and used for the preconcentration and separation of traces of Ru( III), Au(III), V(V) and Ti(IV) ions from sample solutions. The ions an alyzed can be quantitatively enriched by the resin at a flow-rate of 2 mL/min at pH 4, and quantitatively desorbed with 10 mi of 1 mol/L HCl + 0.2 g CS(NH2)(2) at a flow-rate of 1 mL/min with recoveries of over 97%. The chelating resin can be reused 7 times without obvious loss o f efficiency. Thousand-fold excesses of coexistent ions caused little interference during the enrichment and determination steps. The RSDs f or the determination of 50 ng/mL Ru(III) and Au(III), 5.0 ng/mL V(V) a nd Ti(IV) were in the range of 1.5-4.5%. The recoveries of added stand ards in a real sample solution are between 96% and 100%, and the resul ts for the ions analyzed in a nickel alloy sample are in good agreemen t with their reported values.