caa a22 4500 46911228X CHVBK 20180323133114.0 cr unu---uuuuu 170328e19920801xx s 000 0 eng 10.1007/BF02040490 doi (NATIONALLICENCE)springer-10.1007/BF02040490 Optimization of a radioanalytical procedure for the determination of uranium isotopes in environmental samples [Elektronische Daten] [M. Pimpl, B. Yoo, I. Yordanova] A radiochemical procedure is described for the fast and sensitive measurement of uranium isotopes in gaseous and liquid effluents of nuclear facilities. Equally, this procedure is suitable to measure uranium isotopes in all kinds of environmental samples. Uranium is leached from ashed sample materials with HNO3, HF, and Al(NO3)3 solution and separated from matrix elements by extraction with trioctylphosphinic oxide and backextraction with NH4F. After radiochemical cleaning by coprecipitation with LaF3 and anion exchange, uranium isotopes are electroplated on stainless steel discs from HCl/oxalate solution. The preparation is measured by alpha-spectrometry using surface barrier detectors. The detection limit for 1000 minutes of counting time is 2 mBq per sample and nuclide, the chemical yield is in the range of 50 to 80%. Akadémiai Kiadó, 1992 Pimpl M. Central Safety Department, Karlsruhe Nuclear Research Center, Box 3640, D-7500, Karlsruhe, (Germany) aut Yoo B. Korea Advanced Energy Research Institute, Daeduk-Danji, Daejon, (Korea) aut Yordanova I. Institute of Soil Science and Agroecology, Bulgarian Academy of Agriculture, Sofia, (Bulgaria) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 161/2(1992-08-01), 437-441 0236-5731 161:2<437 1992 161 10967 https://doi.org/10.1007/BF02040490 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02040490 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pimpl M. Central Safety Department, Karlsruhe Nuclear Research Center, Box 3640, D-7500, Karlsruhe, (Germany) aut NATIONALLICENCE 700 1- Yoo B. Korea Advanced Energy Research Institute, Daeduk-Danji, Daejon, (Korea) aut NATIONALLICENCE 700 1- Yordanova I. Institute of Soil Science and Agroecology, Bulgarian Academy of Agriculture, Sofia, (Bulgaria) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 161/2(1992-08-01), 437-441 0236-5731 161:2<437 1992 161 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer