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  • 1
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    Unknown
    Reference material for radionuclides in sediment IAEA-384 (Fangataufa Lagoon sediment) (2007)
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © Springer, 2007. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Journal of Radioanalytical and Nuclear Chemistry 273 (2007): 383-393, doi:10.1007/s10967-007-6898-4.
    Description: A reference material designed for the determination of anthropogenic and natural radionuclides in sediment, IAEA-384 (Fangataufa Lagoon sediment), is described and the results of certification are presented. The material has been certified for 8 radionuclides (40K, 60Co, 155Eu, 230Th, 238U, 238Pu, 239+240Pu and 241Am). Information values are given for 12 radionuclides (90Sr, 137Cs, 210Pb (210Po), 226Ra, 228Ra, 232Th, 234U, 235U, 239Pu, 240Pu and 241Pu). Less reported radionuclides include 228Th, 236U, 239Np and 242Pu. The reference material may be used for quality management of radioanalytical laboratories engaged in the analysis of radionuclides in the environment, as well as for the development and validation of analytical methods and for training purposes. The material is available from IAEA in 100 g units.
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
    Format: application/pdf
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  • 2
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    234Th dynamics during a late spring phytoplankton bloom in the eastern Weddell Sea: a high temporal resolution study (2004)
    In:  EPIC3XXVIII SCAR Open Science Conference, 26-28 July, Bremen, Germany.
    Details
    Publication Date: 2019-07-16
    Description: 234Th is a naturally occurring radionuclide constantly produced in sea water by its soluble parent 238U. Due to its high reactivity to particles and relatively short half-life (T1/2 = 24.1 days), 234Th is used as an effective and suitable proxy for describing biogeochemical processes occurring over timescales of days to weeks in the upper water column.In a rapidly changing environment, akin to the water column during the Antarctic spring-summer transition, a study of short timescale alterations of the 234Th/238U equilibrium can significantly improve the understanding of the forces driving exceptional events such as an incipient phytoplankton bloom
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 3
    Electronic Resource
    Electronic Resource
    Radionuclide detection by inductively coupled plasma mass spectrometry: A comparison of atomic and radiation detection methods (1992)
    Springer
    Journal of radioanalytical and nuclear chemistry 160 (1992), S. 341-354 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Radionuclide detection by mass spectrometric techniques offers inherent advantages over conventional radiation detection methods. Since radionuclides decay at variable rates (half-lives) and via various nuclear transformations (i.e. emission of alpha-, beta-, and/or gamma-radiation) their determination via radiation detection depends not only on decay systematics but also on detector technology. Radionuclide detection by directatom measurement, however, is dependent only on technique sensitivity and is indifferent to decay mode. Evaluation of inductively coupled plasma mass spectrometry (ICP/MS) indicates this method to be superior to conventional radiation detection techniques for many radionuclides. This work discusses factors which influence detection by both methods. Illustrative applications of ICP/MS to the ultra-trace determination of several radionuclides, including129I, are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037109
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Actinide bioassays by ICPMS (1998)
    Springer
    Journal of radioanalytical and nuclear chemistry 234 (1998), S. 165-170 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The ever-increasing sensitivity of ICPMS continues to expand the technique’s application in the field of health physics. Enhancements in sample introduction and instrument design over the last few years have resulted in improving the ICPMS detection limit from ∼10 ng/l to≤0.1 ng/l. This additional sensitivity provides greater flexibility in the analysis of long-lived radionuclides in biological fluids, and requires only minimal sample preparation of urine for uranium analysis; the described 3-minute abbreviated matrix separation provides detection limits that are comparable to or better than alpha counting. For urine samples tested having concentrations that exceed the accepted administrative limit for total uranium (0.2 μg/day), isotopic analysis by ICPMS (e.g., determining the presence of236U, or measuring appropriate uranium isotope ratios) provides a reliable indication of occupational exposure. Our laboratory also utilizes ICPMS in a study examining uranium dissolution rate classification of dust collected at the perimeter of a nuclear facility. Specific details regarding these and other health physics applications are featured, including our group’s participation in assisting the DOE with the evaluation of ICPMS as a cost-effective alternative to fission-track analysis for the routine determination of239Pu in urine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02389766
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    Paper (German National Licenses)
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