Extraction chromatographic separations of tantalum and tungsten from hafnium and complex matrix constituents

Snow, Mathew S.; Finck, Martha R.; Carney, Kevin P.; Morrison, Samuel S.

doi:10.1016/j.chroma.2017.01.019

Title: Extraction chromatographic separations of tantalum and tungsten from hafnium and complex matrix constituents

Journal Article · Sun Jan 08 00:00:00 EST 2017 · Journal of Chromatography

DOI:https://doi.org/10.1016/j.chroma.2017.01.019· OSTI ID:1357615

Snow, Mathew S. ^[1]; Finck, Martha R. ^[1]; Carney, Kevin P. ^[1]; Morrison, Samuel S. ^[2]

Idaho National Lab. (INL), Idaho Falls, ID (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Ta, Hf, and W analyses from complex matrices (including environmental samples) require high purification of these analytes from each other and major/trace matrix constituents, but, current state-of-the-art Ta/Hf/W separations rely on traditional anion exchange approaches that suffer from relatively similar distribution coefficient (Kd) values for these analytes. Our work reports assessment of three commercially available extraction chromatographic resins (TEVA, TRU, and UTEVA) for Ta/Hf/W separations. Batch contact studies show differences in Ta/W,Hf Kd values of up to 10⁶, representing an improvement of a factor of 100 and 300 in Ta/Hf and Ta/W Kd values (respectively) over AG1x4 resin. Furthermore, variations in the Kd values as a function of HCl concentration for TRU resin show that this resin is well suited for Ta/Hf/W separations, with Ta/Hf, Ta/W, and W/Hf Kd value improvements of 10, 200, and 30 (respectively) over AG1x4 resin. Finally, analyses of digested soil samples (NIST 2710a) using TRU resin and tandem TEVA-TRU columns demonstrate the ability to achieve extremely high purification (>99%) of Ta and W from each other and Hf, as well as enabling very high purification of Ta and W from the major and trace elemental constituents present in soils, using a single chromatographic step.

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Research Organization:: Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC07-05ID14517; IAA HDTRA1618618

OSTI ID:: 1357615

Report Number(s):: INL/JOU-16-38216; PII: S0021967317300547

Journal Information:: Journal of Chromatography, Vol. 1484, Issue C; ISSN 0021-9673

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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Cited By (2)

Extraction-chromatographic behavior of Zr(IV) and Hf(IV) on TRU and LN resins in mixtures of HNO3 and HF Ekatova, Taisya Yu.; Kazakov, Andrey G. Journal of Radioanalytical and Nuclear Chemistry, Vol. 321, Issue 2 https://doi.org/10.1007/s10967-019-06601-x	journal	June 2019
An improved extraction chromatographic purification of tungsten from a silicate matrix for high precision isotopic measurements using MC-ICPMS Mei, Qing-Feng; Yang, Jin-Hui; Yang, Yue-Heng Journal of Analytical Atomic Spectrometry, Vol. 33, Issue 4 https://doi.org/10.1039/c8ja00024g	journal	January 2018

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Title: Extraction chromatographic separations of tantalum and tungsten from hafnium and complex matrix constituents

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