The distribution of some rare-earth elements (REE) on UTEVA resin was determined from different concentrations of inorganic (HCl, HNO 3 , HClO 4 , HPF 6) and one organic acid-CCl 3 COOH. Low sorption of all REE in the range of 1M-5M HNO 3 was observed. In more concentrated HNO 3 , a rapid increase of the distribution coefficients (K d) was noticed with an increase in the atomic number of the lanthanides as well as in Y and Sc. The system UTEVA-CCl 3 COOH showed a higher selectivity for Eu(III). Chromatographic elution profiles were checked in order to confirm the obtained K d values. All solutions containing the chosen radionuclides were evaporated to dryness under an IR lamp.
In this work, we report the production process of a low-radioactive NH 4 Cl inorganic flux. A γ-ray screening with ultra-low background HPGe spectrometer at LSM underground laboratory and ICP-MS elemental analysis have been performed to estimate the radioactivity level and composition of the final product.
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