Determination of Plutonium in Urine by Anion Exchange

Abstract
Plutonium is concentrated from urine by coprecipitation with alkaline earth phosphates. The precipitate is dissolved in 8 N nitric acid and the plutonium adsorbed from that solution onto a Dow anion exchange resin. Interfering anions adsorbed on the column are removed with 12 N hydrochloric acid. The plutonium is eluted from the column with specially prepared hydrochloric and hydriodic acids, and the alpha activity determined either by direct planchetting or by electrodeposition of the eluate, followed by standard alphacounting techniques. The problems of determining plutonium in urine are discussed and the advantages of the method presented over other procedures are described. The recovery of 0.5 dpm of plutonium from a liter of urine is 84 ± 14 per cent.

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