Abstract
A novel method has been developed for the simultaneous determination of uranium, plutonium and americium nuclides in soil and sediment samples up to 5 g. Samples are destroyed by fusion with sodium hydroxide. Pre-concentration procedure tailored to the extraction chromatography is based on co-precipitation of actinides and removal of silica, iron and calcium. For the sequential separation of actinides a single DGA resin® (containing N,N,N′,N′-tetra-n-octyldiglycol-amide) column is used. Separation of americium from lanthanides is inherently involved in the EC procedure. Alpha sources are prepared from the individual actinides strip solutions. High recoveries (above 75%) and sensitivities (about 0.1 Bq/kg) have been obtained to allow the determination of actinides of environmental levels. The whole procedure can be performed in 2 days.
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