Use of Chelex-100 for selectively removing Y-90 from its parent Sr-90
A method for selectively removing yttrium-90 from its parent strontium-90 contained in an environmental sample includes loading the sample onto a column containing a chelating ion-exchange resin capable of retaining yttrium-90; washing the column with a solution capable of removing strontium, calcium, and other contaminants from the yttrium-90 fraction retained on the column; removing excess acetate salts from the column; eluting yttrium-90 solution from the column and adjusting the pH of this solution to about 2.7; filtering the yttrium-90 solution and weighing this solution for gravimetric yield; and, counting the yttrium-90 containing solution with a radiological counter for a time sufficient to achieve the statistical accuracy desired. It is preferred that the chelating ion-exchange resin is a ligand having the chemical name iminodiacetic acid mounted on a divinyl benzene substrate, converted from sodium form to ammonia form.
- Research Organization:
- Westinghouse Idaho Nuclear Co
- DOE Contract Number:
- AC07-84ID12435
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- Patent Number(s):
- US 5,494,647/A/
- Application Number:
- PAN: 8-131,185
- OSTI ID:
- 201505
- Country of Publication:
- United States
- Language:
- English
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