Determination of trace elements in iron minerals by instrumental and radiochemical neutron activation analysis

Abstract

(FeS 2 ) and chalcopyrite (CuFeS 2 )] 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.

Application of k0-method of neutron activation analysis for determination of trace elements in various mineral samples: a review

“…1. Ratio between k 0 -RNAA (extraction into DIPE and IAA) and k 0 -INAA for REE in hematite [36] In addition, a high recovery of another 12 elements (Ag, Ba, Cd, Co, Cr, Cs, Hg, In, Na, Nd, Sc and Zn) in the aqueous phase after Fe removal with DIPE was also found. Moreover, after the extraction of Fe, the limits of detection for several elements (Ag, Ba, Ca, Ce, U, W) became lower compared to the corresponding values in the k 0 -INAA.…”

“…It could be concluded that the major and trace elements content in three iron minerals using the k 0 -INAA could be determined before and after quantitative removal of Fe by liquid-liquid extraction [36]. It was found that Au, Se, Te, Mo and Sb show similar behaviour in hydrochloric acid solution to Fe, and they could be removed with high efficiency.…”

“…The distribution of 35 elements in extraction systems (with intermediate/medium and long halflived radionuclides) present in the studied minerals was investigated. The results for hematite (Fe 2 O 3 ) are presented in Table 2, where results are compared with k 0 -INAA in powder and k 0 -RNAA obtained after Fe removal from the mineral by DIPE and IAA [36].…”

“…More details for the procedure can be found in Ref. [36]. The similar procedure was carried out using IAA for iron extraction [14] whereas 8 mol l -1 HCl concentration was found as optimal medium for Fe removal using DIPE solvent.…”

Study of transfer of minor elements during ironmaking by neutron activation analysis

“…It has a high sensitivity and good accuracy and it is non-destructive. This method was applied by many authors in order to achieve accurate knowledge of the iron content and the concentrations of trace elements present in iron ores [6], high purity iron as a certified standard material from Iron and Steel Institute of Japan [7], iron certified reference materials using multiple gamma-ray detection method [8], iron-based alloys [9], iron minerals [10] and for the analysis of minor constituents in steels [11]. In previous studies [12,13] INAA was applied for the determination of the compositional scheme of some materials -iron ores and pellets from different reBrought to you by | University of Iowa Libraries Authenticated Download Date | 5/26/15 2:38 PM gions of the world (Australia, Brazil, CSI, India, Mozambique, Romania, Ukraine, Venezuela), slag, cast iron and steels -used in ferrous metallurgical processes in Iron and Steel Integrated Works (ISIW) of Galati, Romania.…”