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Efficient phase transfer of pertechnetate with bicyclic guanidinium compounds |
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| Authors: | H. Stephan R. Berger H. Spies B. Johannsen F. P. Schmidtchen |
| Affiliation: | 1. Forschungszentrum Rossendorf e. V., Institut für Bioanorganische und Radiopharmazeutische Chemie, D-01314, Dresden, Germany 2. Institut für Organische Chemie und Biochemie, Technische Universit?t München, D-85747, Garching, Germany |
| Abstract: | Extraction of pertechnetate with bicyclic guanidinium compounds has been studied in the KTcO4-buffer-H2O/ligand-trichloromethane system. Extraction data of guanidinium ligands have been compared with trialkylmethylammonium (Aliquat 336), tetraphenylphosphonium and tetraphenylarsonium chloride. The lipophilicity of extractants investigated was determined by RP-HPLC. The efficiency of pertechnetate extraction correlates with the lipophilicity of the guanidinium compounds. 1:1 complex formation in the organic phase was observed. The influence of hydroxide, chloride and bicarbonate on the pertechnetate extraction has been investigated. Pertechnetate is extracted with great preference over OH−, Cl− and HCO3 −, ions. |
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