Dissolution of Ir-based alloys including transition metals with sodium peroxide

Yoshinobu Yamamoto, Yoko Yamabe-Mitarai, Naoto Hirosaki, Hiroshi Harada

Research output: Contribution to journalArticlepeer-review


It is well known that Ir is a chemically stable element that is difficult to dissolve, even in a strong acid. Furthermore, when transition metals are added to it, Ir becomes more difficult to dissolve in acid. To solve this problem, we tried to dissolve Ir-Nb, Ir-Zr, Ir-Nb-Zr, Ir-Nb-Pt, Ir-Nb-Pt-Al, and Ir-W alloys using a fusion method at 1073 K in sodium peroxide. This was successful, and the concentration of each element was analyzed with ICP-AES. The result was in good agreement with the nominal concentration. This shows that the fusion method in sodium peroxide and analysis with ICP-AES are suitable for Ir alloys.

Original languageEnglish
Pages (from-to)341-345
Number of pages5
Issue number5
Publication statusPublished - 2003 May


  • Dissolving method
  • Fusion method
  • Ir-alloy
  • Sodium peroxide

ASJC Scopus subject areas

  • Analytical Chemistry


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