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KMID : 0385520140270010066
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Analytical Science & Technology
2014 Volume.27 No. 1 p.66 ~ p.77
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Discrimination of vegetable oils by stable carbon isotope ratio and fatty acid composition
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Kim Jae-Young
Lee Sang-Mok
Chang Moon-Ik
Cho Yoon-Jae
Chae Young-Sik
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Abstract
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This study was carried out to examine the authenticity discrimination of circulated vegetable oils by using carbon isotope ratio (δ13C) and fatty acid composition. This analysis was applied to vegetable oils which we can buy in Korean markets, and the analytical instrument was measured by using EA-IR/MS for δ13C and GC/FID for fatty acid composition. δ13C was separated into 3 groups as C3 plant including sesame oil, C4 plant including maize oil, and rice bran oil. Fatty acid composition was significantly different among vegetable oils. In addition, the interval of low and high price vegetable oils was classified through the scatter plot analysis showing the correlation of the δ13C and fatty acid composition. Therefore, through a simultaneous determination 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.
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KEYWORD
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vegetable oil, stable carbon isotope ratio, fatty acid composition,
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