Concentration of Metal Ions by Complexation with Sodium Bisdithiocarbamate and Sorption on XAD-4 Resin

Article abstract of DOI:10.1021/ac00283a012

Sodium bis<2-hydroxyethyl>dithiocarbamate is used to form neutral metal complexes with metals of the hydrogen sulfide group.The hydroxy groups present in NaHEDC cause the metal complexes to be water-soluble at low concentrations.The complexed metal ions can be separated into groups or concentrated from very dilute solution by sorption on a small column of XAD-4 resin.Selectivity is achieved by pH adjustment or by masking agents.The sorbed metal complexes are eluted with acidic ethanol for subsequent measurement by AAS or absorption spectrophotometry.Applications to show the utillity of the method include concentration of tracemetals from uranium.