Development of new centrifuges for fast solvent extraction of transactinide elements |
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Authors: | J Alstad G Skarnemark F Haberberger G Herrmann A Nähler M Pense-Maskow N Trautmann |
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Institution: | (1) Argonne National Laboratory, 9700 South Cass Avenue, 60439-4831 Argonne, IL, USA |
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Abstract: | Inductively coupled plasma-mass spectrometry (ICP-MS) was used to concurrently determine multiple long-lived (t1/2>104 y) actinide isotopes in soil leachates. Ultrasonic nebulization was found to maximize instrument sensitivity. Instrument detection limits for actinides in solution ranged from 50 mBq L–1 (239Pu) to 2Bq L–1 (235U). Hydride adducts of232Th and238U interfered with the determinations of233U and239Pu; thus, extraction chromatography was used to concentrate the analytes and separate uranium from the other actinides in advance of mass spectrometric determination. Alpha spectrometric determinations of230Th,239Pu, and the234U/238U activity ratio in soil leachates compared well with ICP-MS determinations; however, there were some small systematic differences (ca. 10%) between ICP-MS and -spectrometric determinations of234U and238U activities. These differences were attributed to the use of different isotope dilution spikes for ICP-MS and -spectrometry. |
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