Improving the oxidative stability of polyunsaturated vegetable oils by blending with high-oleic sunflower oil

  • E. N. Frankel
  • S. W. Huang


Mixing different proportions of high-oleic sunflower oil (HOSO) with polyunsaturated vegetable oils provides a simple method to prepare more stable edible oils with a wide range of desired fatty acid composition. Oxidative stability of soybean, canola and corn oils, blended with different proportions of HOSO to lower the respective levels of linolenate and linoleate, was evaluated at 60°C. Oxidation was determined by two methods: peroxide value and volatiles (hexanal and propanal) by static headspace capillary gas chromatography. Determination of hexanal and propanal in mixtures of vegetable oils provided a sensitive index of linoleate and linolenate oxidation, respectively. Our evaluations demonstrated that all-cis oil compositions of improved oxidative stability can be formulated by blening soybean, canola and corn oils with different proportions of HOSO. On the basis of peroxide values, a partially hydrogenated soybean oil containing 4.5% linolenate was more stable than the mixture of soybean oil and HOSO containing 4.5% linolenate. However, on the basis of volatile analysis, mixtures of soybean and HOSO containing 2.0 and 4.5% linolenate were equivalent or better in oxidative stability than the hydrogenated soybean oil. Mixtures of canola oil and HOSO containing 1 and 2% linolenate had the same or better oxidative stability than did the hydrogenated canola oil containing 1% linolenate. These studies suggest that we can obviate catalytic hydrogenation of linolenate-containing vegetable oils by blending with HOSO.

Key Words

Flavor stability headspace volatiles high-oleic sunflower oil hydrogenation linoleate linolenate oxidative stability peroxide values polyunsaturated oils vegetable oil blends 


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  1. 1.
    Mensink, R.P., and M.B. Katan,N. England J. Med. 323:439 (1990).CrossRefGoogle Scholar
  2. 2.
    Zock, P.L., and M.B. Katan,J. Lipid Res. 33:399 (1992).PubMedGoogle Scholar
  3. 3.
    Hayashi, K., Y. Hirata, H. Kurushima, M. Saeki, H. Amioka, S. Nomura, Y. Kuga, Y. Ohkura, H. Ohtani and G. Kajiyama,Atherosclerosis 99:97 (1993).PubMedCrossRefGoogle Scholar
  4. 4.
    Gunstone, F.D., and T.P. Hilditch,J. Chem. Soc.: 1022 (1946).Google Scholar
  5. 5.
    Cowan, J.C., H. Moser, G.R. List and C.D. Evans,J. Am. Oil Chem. Soc. 48:835 (1971).CrossRefGoogle Scholar
  6. 6.
    Purdy, R.H.,Ibid., 62:523 (1985).CrossRefGoogle Scholar
  7. 7.
    Anonymous,INFORM 2:801 (1991).Google Scholar
  8. 8.
    Frankel, E.N.,Frends in Food Science & Technol 4:220 (1993).CrossRefGoogle Scholar
  9. 9.
    Ragnarsson, J.O., and T.P. Labuza,Food Chem. 2:291 (1977).CrossRefGoogle Scholar
  10. 10.
    Chapman, R.H., and K. MacKay,J. Am. Oil Chem. Soc., 26:360 (1949).Google Scholar
  11. 11.
    Christie, W.W.,Lipid Analysis, Pergamon Press, Oxford, 1973, p. 89.Google Scholar
  12. 12.
    Frankel, E.N.,Progr. Lipid Res. 22:1 (1982).CrossRefGoogle Scholar
  13. 13.
    Steel, R.G.D., and J.H. Torrie,Principles and Procedures of Statistics, 2nd edn., McGraw-Hill, New York, 1980, p. 99.zbMATHGoogle Scholar
  14. 14.
    Frankel, E.N., K. Warner and K.J. Moulton, Sr.,J. Am. Oil Chem. Soc., 62:1354 (1985).CrossRefGoogle Scholar
  15. 15.
    Warner, K., inAnalyses of Fats, Oils and Lipoproteins, edited by E.G. Perkins, American Oil Chemists' Society, Champaign, 1991, p. 344.Google Scholar
  16. 16.
    Wilson, R.F., G.W. Burton and P. Kwanyun, inEdible Fats and Oil Processing: Basic Principles and Modern Practices, edited by D.R. Erickson, American Oil Chemists' Society, Champaign, 1989, p. 355.Google Scholar

Copyright information

© American Oil Chemists’ Society 1994

Authors and Affiliations

  • E. N. Frankel
    • 1
  • S. W. Huang
    • 1
  1. 1.Department of Food Science and TechnologyUniversity of CaliforniaDavis

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