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Use of Chelex-100 for selectively removing Y-90 from its parent Sr-90
Use of Chelex-100 for selectively removing Y-90 from its parent Sr-90
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机译:Chelex-100用于从其母Sr-90中选择性去除Y-90的用途
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摘要
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 bidente ligand having the chemical name iminodiacetic acid mounted on a divinyl benzene substrate, converted from sodium form to ammonia form.
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