A NEW CHELATING POLYELECTROLYTE FOR PRECONCENTRATION AND SEPARATION OF TRACE-METALS EMPLOYING RESIN-IMPREGNATED PAPER-CHROMATOGRAPHY AND DETERMINATION BY DIFFERENTIAL-PULSE ANODIC-STRIPPING VOLTAMMETRY

A new chelate-forming polyelectrolytic resin bearing 5-sulfosalicylate counterions was prepared by an ion-exchange method. The resin was amo rphous powder and therefore, batch method of separation endangered lea ching of the ligand to the some extent. Nevertheless, the selective pr econcentration and quantitative separation of Fe3+, Co2+, CU2+ and Ni2 + were found to be feasible by employing chelating resin-impregnated p aper chromatographic method, where separations involved a pH-independe nt differential migration procedure, based on solubility product equil ibria, with aqueous mobile phases. The selectivity of resin for heavy metals, as monitored by differential pulse anodic stripping voltammetr y, was found in the order Fe3+ > Co2+ > Ni2+ approximate to CU2+.