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    Application of trace element and stable isotope signatures to determine the provenance of tea (Camellia Sinensis) samples

    Access Status
    Fulltext not available
    Authors
    Pilgrim, T.
    Watling, J.
    Grice, Kliti
    Date
    2010
    Type
    Journal Article
    
    Metadata
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    Citation
    Pilgrim, Tamara and Watling, John and Grice, Kliti. 2010. Application of trace element and stable isotope signatures to determine the provenance of tea (Camellia Sinensis) samples. Food Chemistry 118: pp. 921-926.
    Source Title
    Food Chemistry
    DOI
    10.1016/j.foodchem.2008.08.077
    ISSN
    03088146
    Faculty
    School of Science and Computing
    Faculty of Science and Engineering
    Department of Applied Chemistry
    Remarks

    Copyright © 2010 Elsevier B.V. All rights reserved

    URI
    http://hdl.handle.net/20.500.11937/26881
    Collection
    • Curtin Research Publications
    Abstract

    The reputation of particular countries, and plantations within those countries, for the production of high quality tea means that these producers can ask a significantly higher price for their specific product than average. This leads to a temptation for unscrupulous producers to fraudulently label their product as coming from one of these areas to take advantage of this higher price. A simple method for the analysis and verification of the country and plantation of origin of tea would provide security to both tea growers and consumers and would largely stamp out this illegal activity. This paper details the use of complimentary organic and inorganic isotope techniques for the analysis of tea samples from Asia. The application of linear discriminant analysis of the isotope ratios and mineral concentrations permitted 97.6% correct classification of the tea samples using the following variables delta D, delta C-13, Ti-49, Cr-53, Co-59, Ni-60, Cu-65, Ga-71, Rb-85, Sr-88, Y-89, Nb-93, Cd-111, Cs-133, Ba-138, La-139, Ce-140, Pr-141, Eu-153, Tl-203, Pb-208 and Bi-209.

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