Assay of actinides in human urine by rapid method |
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Authors: | M Zagyvai N Vajda J Groska Zs Molnár E Bokori P Szeredy |
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Institution: | 1.Centre for Energy Research,Hungarian Academy of Sciences,Budapest,Hungary;2.Radanal Ltd.,Budapest,Hungary |
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Abstract: | A method using DGA resin (N,N,N′,N′-tetra-n-octyldiglycolamide on an inert support) was developed for the rapid analysis of actinides in urine samples. Samples acidified with HCl to 4 M were loaded directly (without digestion) onto a DGA column. Actinides were stripped simultaneously, α-sources were prepared by co-precipitation with NdF3. Americium, plutonium and uranium were separated with acceptable high recoveries (40–80%). The americium, plutonium and uranium content of 100–200 ml urine samples was determined within 24 h with detection limits as low as 0.01 Bq l?1. Based on model experiments using 14C-spiked urea, it was proven that high urea content can affect americium separation deleteriously due to irreversible fixing of americium on DGA resin. |
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