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Separation and preconcentration of actinides from concentrated nitric acid by extraction chromatography in microsystems
- Losno, Marion, Pellé, Julien, Marie, Mylène, Ferrante, Ivan, Brennetot, René, Descroix, Stéphanie, Mariet, Clarisse
- Talanta 2018 v.185 pp. 586-591
- chromatography, nitric acid, radionuclides, resins, thorium, uranium
- An original method of monolith impregnation in microsystem for the analysis of radionuclides in nitric acid is reported. Three microcolumns made of monolith poly(AMA-co-EDMA) were impregnated in COC microsystems. The robustness of the microsystems in nitric acid media until 8 M was demonstrated. High exchange capacity and affinity for tetravalent and hexavalent actinides in concentrated nitric media were obtained. The retention characteristics of the microcolumns impregnated by TBP, TBP-CMPO and DAAP were compared with those of the equivalent commercial particulate resins TBP™, TRU™ and UTEVA™ respectively. The separation of U, Th and Eu was validated in a classical microsystem and a procedure is proposed in a centrifugal microsystem.