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Effects of α-tocopherol on the oxidative stability and incorporation of deuterium in volatiles from a linoleic acid-deuterium model system

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Abstract

The effects of α-tocopherol on the oxidative stability and incorporation of deuterium in volatiles were evaluated in linoleic acid-water model systems treated at 60°C by analyzing headspace oxygen depletion, formation of lipid hydroperoxides, and profiles of headspace volatiles. Deuterium oxide accelerated the rates of linoleic acid oxidation compared to samples in deuterium-free water. As the concentration of α-tocopherol increased from 0 to 1500 ppm, the consumption of headspace oxygen and the formation of volatiles decreased, whereas the contents of lipid hydroperoxides did not decrease in the linoleic acid-water system. The mass to charge ratios (m/z) of volatiles in linoleic aciddeuterium oxide were significantly higher than those with deuterium oxide-free water. Generally, the presence of α-tocopherol decreased the mass to charge ratios (m/z) of volatiles including pentanal, hexanal, t-2-heptenal, and 2-octenal, implying that α-tocopherol may be involved in the aldehyde formation from lipid oxidation.

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Authors and Affiliations

  1. Department of Food and Nutrition, Kangwon National University, Samcheok, Gangwon, 25913, Korea

    Mi-Ja Kim

  2. Department of Food Science and Biotechnology, Sungkyunkwan University, Suwon, Gyeonggi, 16419, Korea

    Sumi Oh, Changkyu Lee, Seo Yeong Gim & JaeHwan Lee

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  1. Sumi Oh
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  2. Changkyu Lee
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  3. Seo Yeong Gim
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  4. Mi-Ja Kim
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  5. JaeHwan Lee
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Correspondence to JaeHwan Lee.

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Oh, S., Lee, C., Gim, S.Y. et al. Effects of α-tocopherol on the oxidative stability and incorporation of deuterium in volatiles from a linoleic acid-deuterium model system. Food Sci Biotechnol 25, 681–686 (2016). https://doi.org/10.1007/s10068-016-0119-2

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  • DOI: https://doi.org/10.1007/s10068-016-0119-2

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