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The method for determination of major and trace elements in iron oxide [hematite (Fe2O3)] and sulfide [pyrite (FeS2) and chalcopyrite (CuFeS2)] minerals using the k 0-method of neutron activation analysis in both forms: instrumental (k 0-INAA) and radiochemical (k 0-RNAA) was suggested. In order to avoid interferences from iron on the determination of elements present in trace levels, radiochemical separation was made. Determination of the investigated elements in the aqueous phase was performed by k 0-RNAA after extraction of iron by isoamyl acetate (IAA) and diisopropyl ether (DIPE) from hydrochloric acid solution. The distribution of 35 elements in extraction systems (with intermediate/medium and long half-lived radionuclides) present in the studied minerals was investigated.
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Makreski et al. (2008) studied this question.
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