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Title: 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 bidente ligand having the chemical name iminodiacetic acid mounted on a divinyl benzene substrate, converted from sodium form to ammonia form.
Inventors:
 [1]
  1. (Idaho Falls, ID)
Issue Date:
OSTI Identifier:
870313
Assignee:
United States of America as represented by United States (Washington, DC) INEEL
Patent Number(s):
US 5494647
Contract Number:
AC07-84ID12435
Research Org:
WESTINGHOUSE IDAHO NUCLEAR CO
Country of Publication:
United States
Language:
English
Subject:
chelex-100; selectively; removing; y-90; parent; sr-90; method; yttrium-90; strontium-90; contained; environmental; sample; loading; column; containing; chelating; ion-exchange; resin; capable; retaining; washing; solution; strontium; calcium; contaminants; fraction; retained; excess; acetate; salts; eluting; adjusting; ph; filtering; weighing; gravimetric; yield; counting; radiological; counter; time; sufficient; achieve; statistical; accuracy; desired; preferred; bidente; ligand; chemical; name; iminodiacetic; acid; mounted; divinyl; benzene; substrate; converted; sodium; form; ammonia; solution capable; environmental sample; acetic acid; selectively removing; time sufficient; exchange resin; column containing; ion-exchange resin; removing excess; acetate salts; sodium form; containing solution; iminodiacetic acid; divinyl benzene; /423/