Selectivity of resins with guanidyl groups towards dicyanoaurate anions

Resins having two types of ligands: guanidine and aminoguanidine on copolym ers of vinylbenzyl chloride (VBC)/ methyl methacrylate (MM)I divinylbenzene (DVB) and on styrene (S)/DVB have been investigated in respect to their se lectivity towards dicyanoaurate anions. Resins coded CH and CP displayed hi gh selectivity and sorption of gold from its diluted solution. They sorbed 10 - 11 mg of gold/g and dicyanoaurate distribution coefficient reached 189 0 and 2290, respectively. Resins have the following selectivity order when sorption was carried out from solution of 5.08 mg Au/dm(3): resin U-BIS Zn> Ag>Au>Cu; resin CP Au>Zn>>Cu>>Ag; resin CH Au>Zn=Ag>>Cu. Resins have weak a ffinity towards iron complexes.