“…As examples w:e cite the determination of iron and cobalt impurities in single crystals of magnesium oxide (183), of trace impurities in aluminum (24), of trace impurities in zinc sulfate solutions used in the electrolytic production of zinc (98, 282), and of precious metals in meteorites (95, 321) and manganese nodules (3, 180). The purity of zonerefined zinc wTas studied by activation and anion exchange (292). Other refferences to activation analysis appear in Table I.…”