Abstract
The major problems of the determination of plutonium in urine are reviewed and a method described which has been in use for several years in the laboratory of the IAEA (Vienna, Seibersdorf). It consists of a preconcentration step (precipitation of Pu on a calcium phosphate carrier) followed by the isolation of Pu by anion-exchange from a 7–8M nitric acid solution of the carrier and elution of the element with dilute hydrochloric acid-hydrofluoric acid mixture. The eluate can either be directly evaporated to dryness in a platinum dish forα-counting or subjected to an improved electrodeposition procedure forα-spectrometry; Pu recovery is usually ≥90%. The advantages of the method are discussed.
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