Dissolution procedures for several vanadium alloys in inductively coupled plasma-optical emission spectrometry

Yûetsu Danzaki, Kazuaki Wagatsuma

Research output: Contribution to journalArticlepeer-review

Abstract

Proper dissolution methods for various V alloys were examined for elemental determination in inductively coupled plasma-optical emission spectrometry (ICP-OES). Several kinds of V alloys were developed for various purposes. Among them, alloys co-containing Ti, Nb, and Ta are being employed as structural materials. Hydrolytic reactions of these elements occur in aqueous solution easily; therefore, an agent should be added to prevent their hydrolysis. Hydrogen peroxide is an effective agent against hydrolysis. However, when H 2O2 is added to solutions containing V, it accelerates the decomposition of H2O2 and then O2 gas generates, which leads to poor precision of the analytical results in ICP-OES. Therefore, a proper dissolution method for each V alloy should be developed without usage of H2O2. V-Cr, V-Fe and V-Mo alloys were dissolved in a HNO3-HCl solution. V-Zr, Ti-Al-V and Ni-Ti-V alloys were finished as a H2SO4 solution after dissolving in HNO3-HF and fuming with H2SO4. A V-Nb alloy was added to a H2SO4-tartaric acid solution after dissolving in HNO3-HF and fuming with H2SO4. A Nb-Al-V alloy was dissolved in NO3-HF at room temperature. Nb-Cr-V alloys were finished as a H2SO4-HF solution after dissolving in HNO3-HCl-HF, followed by fuming with H2SO4 and adding HF.

Original languageEnglish
Pages (from-to)955-958
Number of pages4
JournalBUNSEKI KAGAKU
Volume52
Issue number10
DOIs
Publication statusPublished - 2003 Oct

Keywords

  • Dissolution method
  • ICP-OES
  • Valloy

ASJC Scopus subject areas

  • Analytical Chemistry

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