| Abstract: | Abstract A styrene-divinyl benzene copolymer resin (Amberlite XAD-4), modified with thioglycolate complexing groups, has been employed for the preconcentration of cadmium, zinc, lead and nickel fron natural waters. the resin exhibits its strongest affinity for cadmium and lead but can be used to quantitatively remove all four metals from non-saline waters. With seawater samples, the resin is best only employed for the enrichment of cadmium and lead as the recovery of nickel and zinc from this medium is poor. |
