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Dietz ML, Horwitz EP, Sajdak LR, et al. An improved extraction chromatographic resin for the separation of uranium from acidic nitrate media. Talanta. 2001;54(6):1173-84doi: 10.1016/s0039-9140(01)00390-3.
Dietz, M. L., Horwitz, E. P., Sajdak, L. R., & Chiarizia, R. (2001). An improved extraction chromatographic resin for the separation of uranium from acidic nitrate media. Talanta, 54(6), 1173-84. https://doi.org/10.1016/s0039-9140(01)00390-3
Dietz, M L, et al. "An improved extraction chromatographic resin for the separation of uranium from acidic nitrate media." Talanta vol. 54,6 (2001): 1173-84. doi: https://doi.org/10.1016/s0039-9140(01)00390-3
Dietz ML, Horwitz EP, Sajdak LR, Chiarizia R. An improved extraction chromatographic resin for the separation of uranium from acidic nitrate media. Talanta. 2001 Jul 06;54(6):1173-84. doi: 10.1016/s0039-9140(01)00390-3. PMID: 18968338.
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Talanta. 2001 Jul 06;54(6):1173-84. doi: 10.1016/s0039-9140(01)00390-3.

An improved extraction chromatographic resin for the separation of uranium from acidic nitrate media.

Talanta

M L Dietz, E P Horwitz, L R Sajdak, R Chiarizia

Affiliations

  1. Chemistry Division, Argonne National Laboratory, Argonne, IL 60439, USA.

PMID: 18968338 DOI: 10.1016/s0039-9140(01)00390-3

Abstract

The preparation and characterization of a new extraction chromatographic resin exhibiting extraordinarily strong retention of hexavalent uranyl ion over a wide range of nitric acid concentrations and very high selectivity for U(VI) over Fe(III) and numerous other cations is described. This new material (designated U/TEVA-2) comprises a novel liquid stationary phase consisting of an equimolar mixture of diamyl amylphosphonate (DA[AP]) and Cyanex 923((R)) (a commercially available trialkyl-phosphine oxide, TRPO) sorbed on silanized silica or Amberchrom CG-71. Cyanex 923 is shown to be preferable to a related TRPO, Cyanex 925((R)), due to its lower viscosity and higher selectivity for U(VI) over Fe(III). The retention of uranyl nitrate by the U/TEVA-2 resin, as measured by the k' values (number of free column values to peak maximum) is >5000 from approximately 0.1 to 8 M HNO(3). The ability of the new resin to strongly and selectively retain U(VI) from such a wide range of acid concentrations, along with its favorable physical properties, make it a good candidate for application in the separation and preconcentration of U(VI) from complex environmental, biological, and nuclear waste samples for subsequent determination.

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