Fast methods for determination of antropogenic actinides and U/Th-series isotopes in aqueous samples
| Autor: | Jost Eikenberg, I. Zumsteg, J. Hitz, P. Letessier, Max Ruethi, S. Bajo, Hans-Frieder Beer |
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| Rok vydání: | 2004 |
| Předmět: |
Radioisotopes
Water Pollutants Radioactive Actinoid Series Elements Radiation Ion exchange Curium Radiochemistry Industrial Waste chemistry.chemical_element Americium Sorption Actinide Uranium Alpha Particles Chromatography Ion Exchange Rivers chemistry Nuclear Reactors Ion-exchange resin Anion Exchange Resins Environmental Monitoring Plutonium-238 |
| Zdroj: | Applied Radiation and Isotopes. 61:101-106 |
| ISSN: | 0969-8043 |
| DOI: | 10.1016/j.apradiso.2004.03.020 |
| Popis: | Rapid and simple methods are applied at the PSI radioanalytical laboratory for determining anthropogenic actinides in waste and nuclear reactor waters (U, Pu, Am, Cm) as well as for analysis of naturally occurring alpha-emitters in continental river and ground water. Anion exchange chromatography followed by alpha-spectrometry as well as alpha/beta-LSC is applied for the reactor coolant waters. To avoid alpha-spectrum interference between 238Pu and 241Am at 5.5 MeV, the Pu-fraction is purified using anion exchange resin. Prior to the separation of the Pu-fraction, all actinides (U, Pu, Am, Cm) are adsorbed batch-wise under stirring onto Actinide Resin and subsequent decomposition of the reagent. The residue is then re-dissolved in a sulfate buffer solution for electrolytic deposition. In tabular water samples isotopes of Ra and Po are analyzed additionally via sorption onto manganese coated discs (Ra) and deposition on silver discs (Po). For counting times of 1 day and use of 0.1-1l sample aliquots, detection limits of a few mBql(-1) can be obtained easily. |
| Databáze: | OpenAIRE |
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