Extraction of pertechnetate with tetraphenylphosphonium in the presence of various acids, salts and hydroxides |
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| Authors: | R. Kopunec F. N. Abudeab S. Skraŝková |
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| Affiliation: | (1) Department of Nuclear Chemistry, Faculty of Natural Sciences, Comenius University, SK-842 15 Bratislava, Slovak Republic;(2) Institute of Oncology of St.Elizabet, Clinic of Nuclear Medicine, SK-812 50 Bratislava, Slovak Republic |
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| Abstract: | Solvent extraction of pertechnetate anions from aqueous solutions of some mineral acids (HCl, HNO3, HClO4, H2SO4), (NaCl, NaNO3, NaClO4, K2CrO4, NaCO3), NaOH and NH4OH by tetraphenylphosphonium chloride in chloroform and nitrobenzene was studied. The results are presented in the form of the dependencies of extraction characteristics of TcO 4 − (distribution ratio, percentage of extraction) on the (C6H5)4PCl, H+ and competitive anion concentrations. The solvent extraction of sub-and super-stoichiometric ratio of TcO 4 − : (C6H5)4P+ was performed. The extraction constant values of ion pairs TcO 4 − −Cl−, TcO 4 − −NO 3 − , TcO 4 − −ClO 4 − and of individual anions TcO 4 − , Cl−, NO 3 − , ClO 4 − were calculated. |
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