Abstract
The chemical behavior of calcium, barium and radium in the ion exchange resins Dowex 50W-X8, AG 50W-X8 and Merk I in the presence of ammonium tartrate, EDTA, and citrate has been studied. No differences were observed in results while using any one of the three resins. Calcium, barium and radium were fixed to the exchange column at pH 4.8 EDTA solution. Calcium was eluted in an EDTA solution at pH 5.3, barium and radium between pH 8–11. Elution in citrate media for calcium was achieved at pH 6.1 and for radium at pH 10. In ammonium tartrate, calcium was eluted at pH 6, barium and radium at pH 11.5. Radium was also eluted from the ion exchange resins with a 2M nitric acid solution. The radium free of calcium was electrodeposited onto a stainless steel disc cathode using a 0.1 M potassium fluoride solution, pH 12–14, with a yield of >50%. The energies of226Ra were analyzed through high resolution α-spectra. The226Ra utilized for these experiments was separated from Mexican carnotite.
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Flores-Mendoza, J., Iturbe, J.L. & Jimenez-Reyes, M. Separation and electrodeposition of226Ra. Journal of Radioanalytical and Nuclear Chemistry, Articles 162, 131–138 (1992). https://doi.org/10.1007/BF02039933
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DOI: https://doi.org/10.1007/BF02039933