Simultaneous determination of trace amounts of multielements in metallic materials

Abstract

Separation and determination methods were studied for the simultaneous determination of trace amounts of multielements in metallic materials.In the first study, the separation and determination of trace Ti, Zr, Mo, Sn and Hf in Ni were studied.Ti, Zr, Mo, Sn and Hf were separated from Ni by extracting into benzene with N-benzoyl-N-phenylhydroxylamine(BPA)and subsequently back-extracted into nitric acid for the determination by ICP-AES or ICP-MS.In the second study, the separation and determination of Cu, As, Sb, Pb and Bi in Ni and that of Cu, Ag and Cd in Zn were studied.Trace amounts of these elements were separated from Ni or Zn by extraction into xylene as diethyldithiocarbamate complexes using diethylammonium diethyldithiocarbamate(DDDC), and then back-extracted into nitric acid for the determination by ICP-AES or ICP-MS.In the third study, the method of anion-exchange separation was studied.Trace amounts of Fe, Cu, Zn, Ga, Mo, Cd, In and Sn were separated from Ni by adsorption on an anion-exchange resin column as their chloro complexes in hydrochloric acid media, and then eluted with nitric acid, followed by determinations with ICP-AES or ICP-MS.As a result, sub μg g-1 levels of multielements in Ni or Zn could be successfully determined by the proposed methods.