Determination of iridium and gold in rock samples by using pre-concentration neutron activation analysis

N. Tanaka, Y. Oura, M. Ebihara

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3 Citations (Scopus)


Nickel sulfide (NiS) fire assay was used for the pre-concentration of Ir and Au in rock samples. The beads obtained after fire assay were irradiated directly with neutrons to determine Ir and Au. To suppress the reaction of 58Ni(n,p)58Co, the fire assay was carried out by using a small amount of Ni (0.0625 g) and the NiS bead samples were irradiated by neutrons with high Cd ratios. Analytical results of Ir and Au for rock samples were close to literature values, confirming that our procedure of INAA with pre-concentration can be applied to rock samples for the determination of ppb to sub-ppb level of Ir and Au.

Original languageEnglish
Pages (from-to)603-606
Number of pages4
JournalJournal of Radioanalytical and Nuclear Chemistry
Issue number3
Publication statusPublished - 2008 Dec 1


ASJC Scopus subject areas

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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