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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

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    Discrimination of vegetable oils by stable carbon isotope ratio and fatty acid composition

    Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
    2014, v.27 no.1, pp.66-77
    https://doi.org/10.5806/AST.2014.27.1.66





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    Abstract

    This study was carried out to examine the authenticity discrimination of circulated vegetable oilsby using carbon isotope ratio (δ13C) and fatty acid composition. This analysis was applied to vegetable oilswhich we can buy in Korean markets, and the analytical instrument was measured by using EA-IR/MS forδ13C and GC/FID for fatty acid composition. δ13C was separated into 3 groups as C3 plant including sesameoil, C4 plant including maize oil, and rice bran oil. Fatty acid composition was significantly different amongvegetable oils. In addition, the interval of low and high price vegetable oils was classified through the scatterplot analysis showing the correlation of the δ13C and fatty acid composition. Therefore, through a simultaneousdetermination of the δ13C and fatty acid composition, we are able to determine the majority of vegetable oils. It help to ensure food safety in Korean market by exclusion of economically modified adulteration in food.

    keywords
    vegetable oil, stable carbon isotope ratio, fatty acid composition


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