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Use of Chelex-100 for selectively removing Y-90 from its parent Sr-90

Patent ·
OSTI ID:870313
 [1]
  1. Idaho Falls, ID
+ Show Author Affiliations

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.

Research Organization:
WESTINGHOUSE IDAHO NUCLEAR CO
DOE Contract Number:
AC07-84ID12435
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 5494647
OSTI ID:
870313
Country of Publication:
United States
Language:
English

References (1)

New process makes high-purity yttrium-90 journal August 1990

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Related Subjects

/423/
accuracy
acetate
acetate salts
acetic acid
achieve
acid
adjusting
ammonia
benzene
bidente
calcium
capable
chelating
chelex-100
chemical
column
column containing
contained
containing
containing solution
contaminants
converted
counter
counting
desired
divinyl
divinyl benzene
eluting
environmental
environmental sample
excess
exchange resin
filtering
form
fraction
gravimetric
iminodiacetic
iminodiacetic acid
ion-exchange
ion-exchange resin
ligand
loading
method
mounted
name
parent
ph
preferred
radiological
removing
removing excess
resin
retained
retaining
salts
sample
selectively
selectively removing
sodium
sodium form
solution
solution capable
sr-90
statistical
strontium
strontium-90
substrate
sufficient
time
time sufficient
washing
weighing
y-90
yield
yttrium-90