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Oxidative stability of stripped and nonstripped borage and evening primrose oils and their emulsions in water

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Journal of the American Oil Chemists' Society

Abstract

Oxidative stability of stripped and nonstripped borage and evening primrose oils and their emulsions in water was evaluated. The results indicated that column chromatographic techniques provide an effective means for stripping vegetable oils of their minor components. However, some minor components may be retained in the stripped oils. The minor components in borage and evening primrose oils significantly (P<0.05) influenced their oxidative stability in the dark. In contrast, the behavior of endogenous antioxidants in borage and evening primrose oil-in-water emulsions, according to the “polar paradox” theory, was difficult to evaluate. Correlations existed between peroxide value (PV) and conjugated dienes (CD) (P<0.05) as well as 2-thiobarbituric acid-reactive substances (TBARS) and hexanal content (P<0.01) for most oils and emulsion systems. Therefore, CD and TBARS may generally be used to assess the oxidative stability of borage and evening primrose oils and their oil-in-water emulsions in addition to or in place of PV and headspace volatiles, respectively.

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  1. Department of Biochemistry, Memorial University of Newfoundland, A1B 3X9, St. John's, Newfoundland, Canada

    Muhammad Ahmad Khan & Fereidoon Shahidi

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  1. Muhammad Ahmad Khan
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  2. Fereidoon Shahidi
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Correspondence to Fereidoon Shahidi.

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Khan, M.A., Shahidi, F. Oxidative stability of stripped and nonstripped borage and evening primrose oils and their emulsions in water. J Amer Oil Chem Soc 77, 963–969 (2000). https://doi.org/10.1007/s11746-000-0152-z

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  • DOI: https://doi.org/10.1007/s11746-000-0152-z

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