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    A new method for the determination of low-level actinium-227 in geological samples

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    fLog#190_Dulaiova.pdf (225.3Kb)
    Date
    2012-07-31
    Author
    Dulaiova, Henrieta  Concept link
    Sims, Kenneth W. W.  Concept link
    Charette, Matthew A.  Concept link
    Prytulak, Julie  Concept link
    Blusztajn, Jerzy S.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/5880
    As published
    https://doi.org/10.1007/s10967-012-2140-0
    Keyword
     Actinium-227; Extraction chromatography; Water; Rock; Alpha-spectrometry 
    Abstract
    We developed a new method for the determination of 227Ac in geological samples. The method uses extraction chromatographic techniques and alpha-spectrometry and is applicable for a range of natural matrices. Here we report on the procedure and results of the analysis of water (fresh and seawater) and rock samples. Water samples were acidified and rock samples underwent total dissolution via acid leaching. A DGA (N,N,N’,N’-tetra-n-octyldiglycolamide) extraction chromatographic column was used for the separation of actinium. The actinium fraction was prepared for alpha spectrometric measurement via cerium fluoride micro-precipitation. Recoveries of actinium in water samples were 80±8 % (number of analyses n=14) and in rock samples 70±12 % (n=30). The minimum detectable activities (MDA) were 0.017-0.5 Bq kg-1 for both matrices. Rock sample 227Ac activities ranged from 0.17 to 8.3 Bq kg-1 and water sample activities ranged from below MDA values to 14 Bq kg-1of 227Ac. From the analysis of several standard rock and water samples with the method we found very good agreement between our results and certified values.
    Description
    Author Posting. © The Author(s), 2012. 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 296 (2013): 279-283, doi:10.1007/s10967-012-2140-0.
    Collections
    • Geology and Geophysics (G&G)
    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Preprint: Dulaiova, Henrieta, Sims, Kenneth W. W., Charette, Matthew A., Prytulak, Julie, Blusztajn, Jerzy S., "A new method for the determination of low-level actinium-227 in geological samples", 2012-07-31, https://doi.org/10.1007/s10967-012-2140-0, https://hdl.handle.net/1912/5880
     
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