Study on the Elution Behaviors of Molybdate and Tungstate in Nitric Acid Solution by Anion Exchange Chromatography

음이온 교환수지에 의한 질산산성에서 몰리브덴산과 텅스텐산의 용리현상에 관한 연구

  • 차기원 (인하대학교 이과대학 화학과) ;
  • 최재성 (인하대학교 이과대학 화학과)
  • Published : 1984.02.20

Abstract

The species and equilibrium of molybdate and tungstate have been investigated from the elution behaviors of those in various concentrations of nitric acid and the UV spectra obtained at the various Z values. In higher concentrations than 0.05M nitric acid, the nitarte complex species of $MoO_2(NO_3)_2$ seems to form from the $MoO_2^{2+}$ ions formed by the following equation: $Mo_8O_{26}^{4-} + 20H^+$ ${\rightleftharpoons}$ $8MoO_2^{2+}$ + $10H_2O$. In the case of tungstate, the elution behaviors of tungstate in nitric acid medium are similar to those of perchloric acid, so we think the equilibrium of tungstate existed in perchloric acid could be also existed in nitric acid. These elution behaviors of tungstate are compared with the UV spectra obtained at the various Z values.

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