Extraction-chromatographic isolation of 90Y for medical purposes
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A procedure is described for isolating 90Y from its equilibrium mixture with 90Sr. It is based on extraction-chromatographic separation of 90Sr and 90Y on columns packed with a solid extractant based on di-2-ethylhexyl hydrogen phosphate. Further purification of 90Y is made by its sorption on a column with an yttrium-specific sorbent based on octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide in TBP, and then on a cation-exchange resin. The whole process is performed in a nitric acid solution, which, in contrast to hydrochloric acid solutions, does not cause strong corrosion of stainless steel equipment, thus facilitating decontamination of the final product from inactive impurity cations.
Keywordsyttrium-90 strontium-90 extraction chromatography
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