Füeg, B.; Tschachtli, Τ.; Krähenbühl, U. (1997). Alpha Liquid-Scintillation Spectrometry used for the Measurement of Uranium/Thorium-Disequilibria in Soil Samples. Radiochimica acta, 78(S1), pp. 47-51. Oldenbourg 10.1524/ract.1997.78.special-issue.47
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For the measurements of low-level radioactivity of natural samples, it is of interest to have a system with high counting efficiency. Alpha liquid-scintillation spectrometry is attractive, because it offers a 4 π geometry. Some chemical separation can be obtained using extractive scintillators. Due to quenching problems for natural samples, additional separation power is needed. A new sample preparation method was developed em-ploying extraction chromatographic resin for measuring 238U, 234U, 232Th, 230Th, 228Th and 226Ra in soil samples, without using any uranium- or thorium-tracer for determining the chemical yields. This method was tested by analyzing the two different reference materials, IAEA-375, soil from Tschernobyl, as well as IAEA SDA-1, a deep-sea sediment with a high calcium con-tent. For all analyzed radionuclides the recoveries were better than 90% with errors (confidence level of 95%) smaller than 5%. The minimal detectable concentration ranges between 0.2 and 0.8 Bq/kg, based on a one gram aliquot of sample and 80'000 seconds counting time.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP) |
UniBE Contributor: |
Krähenbühl, Urs |
Subjects: |
500 Science > 570 Life sciences; biology 500 Science > 540 Chemistry |
ISSN: |
0033-8230 |
Publisher: |
Oldenbourg |
Language: |
English |
Submitter: |
Marceline Brodmann |
Date Deposited: |
24 Sep 2020 09:07 |
Last Modified: |
29 Jun 2023 21:35 |
Publisher DOI: |
10.1524/ract.1997.78.special-issue.47 |
BORIS DOI: |
10.7892/boris.115345 |
URI: |
https://boris.unibe.ch/id/eprint/115345 |
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