Selective extraction of 210Po from drinking water - validation of the methodAim of the studyThe aim of the project was to examine a fast and cost-effective analysis method suitable for analysing 210Po drinking water samples. Determination of 210Po from drinking water is important since, after 222Rn, the second main effective dose is caused by 210Po. The method in use is selective and sensitive but time-consuming compared to the studied method. ImplementationThe suitability of the three various extraction solutions for determination of 210Po from drilled well water was examined. 210Po was extracted into extraction solution where a small aliquot for activity measurement was taken. The first tests were done using tracers (209Po, 234,238U, 232Th) in order to check interferences of radionuclides. After the first tests, the extraction efficiency of 210Po using real drilled well waters is examined. The reference activity concentration was determined using a spontaneous deposition of 210Po onto a silver disk. The validation of the methods is done if the results from the first tests indicate suitability of the method for analysing 210Po from drilled well water. Dissemination and exploitation of the resultsThe results are utilised in the measurement services, in the research projects carried out at STUK and in the emergency preparedness. A Master’s Thesis and a scientific article will be written on the basis of the results. CollaboratorsUniversity of Helsinki, Laboratory of Radiochemistry, Finland Timetable2007 - 2009 Responsible scientistPia Vesterbacka More informationJokelainen L. Polonium-210:n selektiivinen uutto porakaivovedestä. Pro gradu -tutkielma. Helsingin yliopisto, Kemian laitos, Radiokemian laboratorio, 2008 Jokelainen L, Vesterbacka P, Lehto J. Method validation in solvent extraction for 210Po determination from groundwaters. Radiochim. Acta 2010; 98: 91-97 Page updated 13/07/2010
|
/ Research |