Method for rapid tritiated water extraction from environmental samples |
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Authors: | R Failor L Belovodsky V Gaevoy A Golubev |
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Institution: | (1) Safety Labs Division, Lawrence Livermore National Laboratory, Livermore, CA, USA;(2) Russian Federal Nuclear Center, All-Russian Scientific Research Institute of Experimental Physics, Arzamas-16, Russia |
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Abstract: | We have developed a thermal vacuum desorption process to rapidly extract water from environmental samples for tritium analysis.
Thermal vacuum desorption allows for extraction of the moisture from the sample within a few hours in a form and quantity
suitable for liquid scintillation counting and allows detection of tritium at the levels of <2 Bq/l of milk, <0.5 Bq/g of
vegetation, and <0.5 Bq/g of soil. We developed a prototype unit that can process batches of twenty or more samples within
24 hours. Early data shows that a high percentage of water is extracted reproducibly without enrichment or depletion of the
tritium content. The quench coefficient of the extracted water is low allowing for accurate, direct liquid scintillation counting.
In most samples, good comparison has been observed with results using freeze-dry lyophilization as the water extraction method |
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