Y 3? retention from aqueous media onto Chelex-100 sorbent impregnated with ammonium nitrate was studied. Y 3? uptake was rapid, reached maximum within 40 min and followed pseudo first order equation. Modified Chelex100 sorbent was successfully packed in column for separation of 90 Y from its parent 90 Sr. The method was based upon retention of Y 3? at pH 1.0 onto sorbent packed column in aqueous diethylenetriaminepentaacetic acid (DTPA). Y 3? species were recovered with HNO 3 and analyzed. The radiochemical and radionuclide purity of 90 Y in the eluate were ascertained. The method is low cost and provides rapid approach for separation of Y 3? from Sr 2? .

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