Isotopic and ultratrace analysis of uranium by double-focusing sector field ICP mass spectrometry |
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| Authors: | W. Kerl J. S. Becker H.-J. Dietze W. Dannecker |
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| Affiliation: | Zentralabteilung für Chemische Analysen, Forschungszentrum Jülich GmbH, D-52?425 Jülich, Germany, DE
Institut für Anorganische und Angewandte Chemie der Universit?t Hamburg, D-20?146 Hamburg, Germany, DE
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| Abstract: | An analytical method for the ultratrace and isotopic analysis of uranium in radioactive waste samples using a double-focusing sector field ICP mass spectrometer is described. In high-purity water a detection limit for uranium in the lowest fg/mL range has been achieved. Under optimum experimental conditions (235U/238U ≈ 1), the precision in 235U/238U isotopic ratio determinations has been determined as 0.07% RSD. With the isotopic standard U-020 (235U/238U = 0.0208) a precision of 0.23% RSD at the 100 pg/mL level using ultrasonic nebulization has been achieved. With 234U/238U isotopic ratios of down to 10–5, the values obtained by double-focusing sector field ICP-MS and alpha spectrometry were in agreement. Received: 27 February 1997 / Revised: 10 Juni 1997 / Accepted: 12 June 1997 |
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