1973•OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)Requires access
Separation of daughter nuclides from $sup 90$Sr--$sup 90$Y and $sup 140$La-- $sup 140$Ba systems by thin-layer chromatographic methods
Yasuyuki Maki, Yūichiro Murakami
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Abstract
The separation of daughter nuclides in the carrier-free state from /sup 90/Sr-/sup 90/Y and /sup 140/Ba--/sup 140 La/ aqueous solution systems was performed by thin-layer chromatographic methods. (1) When a silica gel adsorbent and a developer of 1N NaCl. KCl, NH/sub 4/Cl, CaCl/sub 2/, SrCl/sub 2/, or BaCl/ sub 2/ solutions was employed, /sup 90/Y and / sup 140/La were retained at the origin, while /sup 90/Sr and /sup 140/Ba advanced with the developer front. Addition of gypsum as binder to the silica gel prevented the separation of the / sup 140/Ba-/sup 140/La system, retaining both components at the origin. (2) When the /sup 140/Ba-/sup 140/La system was developed with water on a silica gel adsorbent containing 5% of gypsum, which was treated with various concentrations of nitric acid, the Rf value of /sup 140/La increased with the concentration of nitric acid used, reaching a maximum of 0.98 at 0.1N. The Rf value then decreased on the further increase of the concentration of nitric acid. When the same process was applied to the /sup 90/Sr--/sup 90/Y system there was no separation. The radiochemical purities of /sup 90/Y and /sup 140/La obtained in the above two ways were more than 99%.more » (auth)« less