Abstract
Oxidative stability of flax and hemp oils, and of flax and hemp oils stripped of their minor components, was evaluated in the dark at 60°C and under fluorescent light at 27°C. Several analytical methods were used to assess the oxidative stability of oils. Oil extracts were also investigated for their scavenging of 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical and for their total phenolic contents. The results indicate that bioactive constituents of these edible oils play a major role in their oxidative stability. However, the FA composition of the oils and their total content of tocopherols as well as the type of pigments present contribute to their stability. Nonstripped flax and hemp oils were more stable than their corresponding stripped counterparts. Furthermore, nonstripped hemp oil had a higher oxidative stability than nonstripped flax oil as evidenced by scavenging of DPPH radical and consideration of total phenolic contents.
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References
Wagner, K.-H., and I. Elmadfa, Effects of Tocopherol and Their Mixtures on the Oxidative Stability of Olive Oil and Linseed Oil Under Heating, Eur. J. Lipid Sci. 102:624–629 (2000).
Shahidi, F., and V.K.S. Shukla, Nontricylglycerol Constituents of Fats and Oils, INFORM 7:1227–1231 (1996).
Espin, J.C., C.S. Rivas, and H.J. Wichers, Characterization of the Total Free Radical Scavenging Capacity of Vegetable Oils and Oil Fractions Using 2,2-Diphenyl-1-picrylhydrazyl Radical, J. Agric. Food Chem. 48:648–656 (2000).
King, D.L., T.S. Hahm, and D.B. Min, Chemistry of Antioxidants in Relation to Shelf Life of Foods, in Shelf Life Studies of Foods and Beverages: Chemical, Biological, Physical and Nutritional Aspects, edited by G. Charalambous, Elsevier Applied Science, New York, 1995, pp. 629–705.
Wanasundara, U.N., F. Shahidi, and C.R. Jablonski, Comparison of Standard and NMR Methodologies for Assessment of Oxidative Stability of Canola and Soybean Oils, Food Chem. 52:249–253 (1995).
Shahidi, F., and U.N. Wanasundara, Methods of Measuring Oxidative Rancidity in Fats and Oils, in Food Lipids: Chemistry, Nutrition, and Biotechnology, edited by C.C. Akoh and D.B. Min, Marcel Dekker, New York, 1998, pp. 377–396.
Khan, M.A., and F. Shahidi, Effects of Natural and Synthetic Antioxidants on the Oxidative Stability of Borage and Evening Primrose Triacylglycerols, Food Chem. 75:431–437 (2001).
Min, D.B., A Study of Color Stability and Red Color Development During Epoxidation of Tall Oil Fatty Acids Through the Isolation and Characterization of Minor Constituents, Ph.D. Thesis, Rutgers University, New Brunswick New Jersey, 1973.
IUPAC, Standard Methods for the Analysts of Oils, Fats and Derivatives, 7th edn., edited by C. Paquot and A. Haufenne, International Union of Pure and Applied Chemistry, Blackwell Scientific, Oxford, 1987, pp. 210–211.
AOCS, Official Methods and Recommended Practices of the American Oil Chemists' Society, 4th edn., AOCS Press, Champaign, IL, 1993.
Shahidi, F., R. Amarowicz, H.A. Abou-Gharbia, and A.A.Y. Shehata, Endogenous Antioxidants and Stability of Sesame Oil as Affected by Processing and Storage, J. Am. Oil Chem. Soc. 74:143–148 (1997).
Singleton, V.L., and J.A. Rossi, Colorimetry of Total Phenolics with Phosphomolybic-Phosphotungstic Acid Reagents, Am. J. Enol. Vitic. 16:144–156 (1965).
Lee, E.C., and D.B. Min, Quenching Mechanisms of β-Carotene on the Chlorophyll Sensitized Photooxidation of Soybean Oil, J. Food Sci. 56:1894–1895 (1988).
Wanasundara, P.K., and F. Shahidi, Process-Induced Compositional Changes of Flaxseed, Adv. Exp. Med. Biol. 434:307–325 (1998).
Blekas, G., M. Tsimidou, and D. Boskou, Contribution of α-Tocopherol to Olive Oil Stability, Food Chem. 52:289–294 (1995).
Lampi, A-M., A. Hopia, P. Ekholm, and V. Piironen, Method for the Preparation of Triacylglycerol Fractions from Rapeseed and Other Oils for Autooxidation Studies, Food Sci. Technol. 25:386–388 (1992).
Moes, J., A. Sturko, and R. Przybylski, Agronomic Research on Hemp in Manitoba, in Perspectives on New Crops and New Uses, edited by J. Janick, ASHS Press, Alexandria, VA, 1999, pp. 300–305.
Dutton, H.J., C.R. Lancaster, C.D. Evans, and J.C. Cowan, The Flavor problem of Soybean Oil. VIII. Linolenic Acid, J. Am. Oil Chem. Soc. 28:115–118 (1951).
Khan, M.A., and F. Shahidi, Photooxidative Stability of Stripped and Non-stripped Borage and Evening Primrose Oils and Their Emulsions in Water, Food Chem. 79:47–53 (2002).
Hall, C., and S. Cuppett, The Effects of Bleached and Unbleached Rosemary Oleoresins on Light-Sensitized Oxidation of Soybean Oil, J. Am. Oil Chem. Soc. 70:477–482 (1993).
Abou-Gharbia, H.A., F. Shahidi, A.A. Shehata, and M.M. Youssef, Effects of Processing n Oxidative Stability of Sesame Oil Extracted from Intact and Dehulled Seeds, ——Ibid.d. 74:215–221. (1997).
Tovar, M.J., J. Motilva, and M.P. Romero, Changes in the Phenolic Composition of Virgin Olive Oil from Young Trees Olea europae L. cv. Arbequina) Grown Under Linear Irrigation Strategies, J. Agric. Food Chem. 49:5502–5508 (2001).
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Abuzaytoun, R., Shahidi, F. Oxidative stability of flax and hemp oils. J Amer Oil Chem Soc 83, 855–861 (2006). https://doi.org/10.1007/s11746-006-5037-7
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DOI: https://doi.org/10.1007/s11746-006-5037-7