Abstract
An alternative method for determination of Pu isotopes in various environmental samples has been developed. The separation of Pu is attained by two stage solvent extraction with triisooctylamine/xylene in hydrochloric acid and nitric acid [Pu is converted to Pu4+ by the redox system Fe3+/(NO3)−/(SO3)2−] media. The analytical method has been successfully applied for the determination of Pu isotopes in surface air in a 100 km area around the Kozloduy Nuclear Power Plant in Bulgaria and in surface water of the Danube River. The analytical quality was checked by analyzing reference materials from IAEA (Soil-6, IAEA-375, IAEA-384) and NPL (AL-2008, AL-2009, AL-2010, AL-2011).
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