Abstract
Three procedures for separating of Cs and Rb from geological samples were investigated. The fractional recovery was determined by radioactive tracers and by RNAA. In the first procedure 0.2 g of irrdiated sample is fused with Na2O2, acidified and passed through a clinoptilolite zeolite column. Cs and Rb were eluted with 7.5M HNO3; chemical yields are in the range 93–98%. The second procedure is a supplement to the SUNDBERG and BOYNTON (1976) procedure; a previously discarded anion-exchanger effluent, containing Cs, Rb, Co, Na, etc., is passed through a clinoptilolite column. Cs and Rb are eluted with 7.5M HNO3; yields are in the range of 82–94%. A third separation involves precipitation of Cs and Rb from the effluent and washings with sodium tetraphenylborate (NaBPh4); yields are 64–83%.
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Andao, D. Radiochemical neutron activation analysis of Cs and Rb in geological samples using zeolite (clinoptilolite) chromatography and sodium tetraphenylborate precipitation. Journal of Radioanalytical and Nuclear Chemistry, Articles 159, 293–299 (1992). https://doi.org/10.1007/BF02040723
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DOI: https://doi.org/10.1007/BF02040723