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    A detailed investigation of pretreatment protocols for high precision radiocarbon measurements of annual tree-rings

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    AMS_14_Paper_Revised-3.pdf
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    Description:
    Final Accepted Manuscript
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    Author
    Lange, T.E.
    Nordby, J.A.
    Murphy, P.L.O.
    Hodgins, G.W.L.
    Pearson, C.L.
    Affiliation
    Univ Arizona, AMS Lab
    Univ Arizona, Lab Tree Ring Res
    Issue Date
    2019-09-15
    Keywords
    Tree-ring chronology
    Radiocarbon dating
    Wiggle matching
    Dendrochronology
    High resolution C-14 dating
    
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    ELSEVIER
    Citation
    Lange, T. E., Nordby, J. A., Murphy, P. L. O., Hodgins, G. W. L., & Pearson, C. L. (2019). A detailed investigation of pretreatment protocols for high precision radiocarbon measurements of annual tree-rings. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 455, 230-233.
    Journal
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
    Rights
    © 2019 Elsevier B.V. All rights reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Much discussion has revolved around proper sample types and pretreatment methods to generate a calibration dataset that would allow for the most accurate representation of an unknown sample's calendar age. Since the development of radiocarbon dating, tree-rings have played a vital role in the creation of global calibration datasets, with these samples being subjected to varying degrees of both physical and chemical pretreatments. With an international move away from multi-ring composite measurements and toward higher resolution annual and/or sub-annual measurement of radiocarbon content, and with the on-set of a major new research project using, primarily the highly resinous North American Bristlecone Pine, we set out to review sample preparation procedures. The question became; which fraction, and therefore how much pretreatment is really necessary in order to extract the most representative and replicable C(14 )determination in a tree-ring for any given growth year, and could it be both specimen as well as species dependent? For this study, a total of four samples were chosen. These samples consisted of two rings from two different years from Bristlecone Pine and two rings from these same years from Irish Oak. These rings were each treated with a series of progressively more aggressive chemical treatments allowing for the extraction of different fractions from each ring. An analysis of the different pretreatment methods, as well as interspecies variance, is discussed.
    Note
    24 month embargo; published online: 19 January 2019
    ISSN
    0168-583X
    DOI
    10.1016/j.nimb.2019.01.011
    Version
    Final accepted manuscript
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.nimb.2019.01.011
    Scopus Count
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    UA Faculty Publications

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