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KMID : 1059519840280010054
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Journal of the Korean Chemical Society
1984 Volume.28 No. 1 p.54 ~ p.61
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Study on the Elution Behaviors of Molybdate and Tungstate in Nitric Acid Solution by Anion Exchange Chromatography
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Cha Ki-Won
Choi Jae-Seong
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Abstract
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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 MoO2(NO3)2 seems to form the MoO22+ ions formed by the following equation: Mo8O264- ＋ 20H+ ↔ 8MoO22+ ＋ 10H2O. 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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