Abstract
An extraction system based on monoisooctyl phosphate appeared to be the most promising since the reagent, when present only as an impurity in a solution of di-2-ethylhexyl phosphate in isooctane, will extract americium from dilute nitric acid. Due to the commercial unavailability of monoisooctyl phosphate the studies reported involve the appraisal of a homologue mono-3, 5, 5-trimethylhexyl phosphate (nonylphosphate). The method described utilizes the direct extraction of americium and curium from an acidic solution of sample ash into a solution of nonyl phosphate and scintillants in toluene. Liquid scintillation counting is done with both phases present in the vial. (LK)
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