1991 Volume 7 Issue Supple Pages 1131-1134
Flameless atomic absorption spectrophotometric methods combined with preconcentration by using tailor made chelate-forming resins have been developed for the determination of very low concentrations of several heavy metal ions in environmental water samples. The chelate-forming resin is prepared by loading a sulfonated dithizone (DzS) on an anion-exchange resin. DzS-loaded resin is useful for selective collection of heavy metal ions. The resin, in which metal ions are adsorbed, is introduced into a graphite-furnace in the determination of nickel(II), cobalt(II), copper(II) and palladium(II) and into a vessel for hydride generation in the case of lead(II), without eluting the metal ions from the resin. The proposed methods have been applied successfully to the determination of trace amounts of heavy metal ions in environmental water samples.
