Abstract
Removal of sodium on a polymer containing cryptand 221B permits rapid determination of a number of elements in biological samples by neutron activation. Sodium is retained on the polymer from EDTA solution at pH 10 and other elements are quantified in the eluate. The polymer capacity is 6.1 mg sodium per g of polymer and the sodium ions can be simply eluted with 1 M nitric acid for column re-use. Selected elements have been determined in reference samples of wheat flour, animal muscle, and oyster tissue.
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