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METHOD AND APPARATUS FOR EXTRACTION OF STRONTIUM FROM URINE

United States Patent Application

20130017613
A1
View the Complete Application at the US Patent & Trademark Office
More Rapid Detection of Strontium in Urine Samples (IN-10-037)
The present invention provides an apparatus and rapid methods for extracting strontium ions from urine to provide a concentrated and purified strontium-90 extract suitable for scintillation measurements. The methods remove organic compounds, pigments, and alkali metal ions that can interfere with quantitative determination of strontium-90 in urine. A method of the invention comprises acidifying urine and removing organic pigments therefrom, loading a known quantity of so-treated urine onto a diphosphonic acid-based ion-exchange resin; flowing aqueous methanesulfonic acid through the diphosphonic acid-based ion-exchange resin to elute alkali metal ions therefrom; eluting strontium ions off of the diphosphonic acid-based resin and on to a strontium extraction chromatographic resin with a concentrated aqueous nitric acid solution; subsequently flowing water or a dilute acid stripping solution through the strontium extraction resin to strip the strontium from the strontium extraction resin; and collecting the strontium-containing stripping solution eluting from the strontium extraction resin.
KAMINSKI, Michael D. (Lockport, IL), MERTZ, Carol J. (Downers Grove, IL), SHKROB, Ilya A. (Chicago, IL), DIETZ, Mark L. (Evanston, IL), HAWKINS, Cory A. (Shorewood, WI)
UCHICAGO ARGONNE, LLC (Chicago IL)
13/ 182,873
July 14, 2011
CONTRACTUAL ORIGIN OF THE INVENTION [0001] The United States Government has rights in this invention pursuant to Contract No. DE-AC02-06CH11357 between the United States Government and UChicago Argonne, LLC representing Argonne National Laboratory.