| Autor: |
Kazakov, A. G., Garashchenko, B. L., Yakovlev, R. Yu., Vinokurov, S. E., Kalmykov, S. N., Myasoedov, B. F. |
| Předmět: |
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| Zdroj: |
Radiochemistry; May2020, Vol. 62 Issue 5, p592-598, 7p |
| Abstrakt: |
A method has been developed for isolation of 228Ac from aged samples of natural 232Th. Macroscopic amounts of the thorium bulk (20 g) were separated by its extraction by a solution of di(2-ethylhexyl)phosphoric acid in toluene from 4 M HNO3 solutions, with microamounts of 228Ra and 228Ac remaining in the aqueous phase. 228Ac was selectively extracted from the resulting solution by the method of extraction chromatography on a column with RE resin sorbent, and 228Ra quantitatively remained in the 4 M HNO3 eluate. 228Ac was washed out of the column with 0.05 M HNO3, it could be used as a radioisotope for research purposes. After the accumulation of the daughter 228Ac the solution of 228Ra in 4 M HNO3 was repeatedly passed through an identical column. The resulting 228Ac was used in the study to examine its sorption on commercial and modified carbon nanomaterials (CNMs) instead of the difficultly accessible 225Ac. It is shown that the application of CNMs as carriers of actinium isotopes for nuclear medicine purposes is promising. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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