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Journal of the American Oil Chemists' Society

, Volume 86, Issue 2, pp 149–156 | Cite as

Degradation and Nutritional Quality Changes of Oil During Frying

  • Felix A. Aladedunye
  • Roman PrzybylskiEmail author
Original Paper

Abstract

The changes in regular canola oil as affected by frying temperature were studied. French fries were fried intermittently in canola oil that was heated for 7 h daily over seven consecutive days. Thermo-oxidative alterations of the oil heated at 185 ± 5 or 215 ± 5 °C were measured by total polar components (TPC), anisidine value (AV), color components formation, and changes in fatty acid composition and tocopherols. Results showed that TPC, AV, color and trans fatty acid content increased significantly (P < 0.05) as a function of frying temperature and time. The oil polyunsaturated fatty acids (PUFA) decreased in direct proportion to frying temperature and time. After 7 days of frying, the amount of PUFA was reduced by half and the trans isomers contribution increased 2.5 times during frying at 215 °C. Of the parameters assessed, total polar component and color had the highest correlation, with correlation coefficients of 0.9650 and 0.9302 for frying at 215 and 185 °C, respectively. TPC formation correlated inversely with the reduction of tocopherols.

Keywords

Canola oil Frying performance Total polar component Anisidine value Color Frying temperature Tocopherols French fries Fatty acids 

Notes

Acknowledgments

Financial support from Canola Council of Canada and Alberta Value Added Corporation for this research are gratefully acknowledged.

References

  1. 1.
    Warner K (2004) Chemical and physical reactions in oil during frying. In: Gupta MK, Warner K, White PJ (eds) Frying technology and practice. AOCS, Champaign, pp 16–28Google Scholar
  2. 2.
    Gupta MJ (2004) The effect of oil processing on frying oil stability. In: Gupta MK, Warner K, White PJ (eds) Frying technology and practice. AOCS, Champaign, pp 76–90Google Scholar
  3. 3.
    Chang TY, Eiserich JP, Shibamoto T (1993) Volatile compounds identified in headspace samples of peanut oil heated under temperature ranging from 50 to 200°C. J Agric Food Chem 41:1467–1470CrossRefGoogle Scholar
  4. 4.
    Perkins EG (1996) Volatile odor and flavor components formed in deep frying. In: Perkins EG, Erickson MD (eds) Deep frying: chemistry, nutrition and practical applications. AOCS, Champaign, pp 43–48Google Scholar
  5. 5.
    Stevenson SG, Jeffery L, Vaisey-Genser M, Fyfe B, Hougen FW, Eskin NAM (1984) Performance of canola and soybean fats in extended frying. Can Inst Food Sci Technol J 17:187–194Google Scholar
  6. 6.
    Przybylski R, Eskin NAM (1995) Methods to measure volatile compounds and the flavor significance of volatile compounds. In: Warner K, Eskin NAM (eds) Methods to assess quality stability of oils and fat-containing foods. AOCS, Champaign, pp 107–133Google Scholar
  7. 7.
    Melton SL, Jafar S, Sykes D, Trigiano MK (1994) Review of stability measurements for frying oils and fried food flavor. J Am Oil Chem Soc 71:1301–1308CrossRefGoogle Scholar
  8. 8.
    Al-Kahtani HA (1991) Survey of quality of used frying oils from restaurants. J Am Oil Chem Soc 68:857–862CrossRefGoogle Scholar
  9. 9.
    Che Man YB, Tan CP (1999) Effects of natural and synthetic antioxidants in refined, bleached, and deodorized palm olein during repeated deep-fat frying of potato chips. J Am Oil Chem Soc 76:331–339CrossRefGoogle Scholar
  10. 10.
    Achir N, Kara W, Chipeaux C, Trezzani I, Cuvelier ME (2006) Effect of energy transfer conditions on the chemical degradation of frying oil. Eur J Lipid Sci Technol 108:999–1006CrossRefGoogle Scholar
  11. 11.
    Valdes AF, Garcia AB (2006) A study of the evolution of the physicochemical and structural characteristics of olive and sunflower oils after heating at frying temperatures. Food Chem 98:214–219CrossRefGoogle Scholar
  12. 12.
    Fiselier K, Bazzocco D, Gama-Baumgartner F, Grob K (2006) Influence of frying temperature on acrylamide formation in French fries. Eur Food Res Technol 222:414–419CrossRefGoogle Scholar
  13. 13.
    Chang SS, Peterson RJ, Ho CT (1978) Chemical reactions involved in deep-fat frying of foods. J Am Oil Chem Soc 55:718–727CrossRefGoogle Scholar
  14. 14.
    Fritsch CW (1981) Measurements of frying fat deterioration: a brief review. J Am Oil Chem Soc 58:272–274CrossRefGoogle Scholar
  15. 15.
    Guillen MD, Cabo N (2002) Fourier transform infrared spectra data versus peroxide and anisidine values to determine oxidative stability of edible oils. Food Chem 77:503–510CrossRefGoogle Scholar
  16. 16.
    Dobarganes C, Marquez-Ruiz G (2003) Oxidized fats in foods. Curr Opin Clin Nutr Metab Care 6:157–163CrossRefGoogle Scholar
  17. 17.
    Firestone D (1999) Official methods and recommended practices of the American Oil Chemists’ Society, 5th edn. AOCS, ChampaignGoogle Scholar
  18. 18.
    Velasco J, Berdeaux O, Marquez-Ruiz G, Dobarganes MC (2002) Sensitive and accurate quantification of monoepoxy fatty acids in thermooxidized oils by gas–liquid chromatography. J Chromatogr A 982:145–152CrossRefGoogle Scholar
  19. 19.
    Association of Official Analytical Chemists (1990) Official methods of analysis of the association of official analytical chemists’ 15th edn. AOAC Inc. Arlington, Method 982.27Google Scholar
  20. 20.
    International Organization for Standardization (2004) Animal and vegetable fats and oils—determination of anisidine value, ISO, Geneva, Standard No. 6885Google Scholar
  21. 21.
    International Organization for Standardization (2007) Animal and vegetable fats and oils—determination of polymerized triglycerides content by high-performance size-exclusion chromatography (HPSEC), ISO, Geneva, Standard No. 16931Google Scholar
  22. 22.
    Marquez-Ruiz G, Jorge NI, Martfn-Polvillo M, Dobarganes MC (1996) Rapid, quantitative determination of polar compounds in fats and oils by solid-phase extraction and size-exclusion chromatography using monostearin as internal standard. J Chromatogr A 749:55–60CrossRefGoogle Scholar
  23. 23.
    Orthoefer FT, Cooper DS (1996) Initial quality of frying oil. In: Perkins G, Erickson MD (eds) Deep frying: chemistry, nutrition and practical applications. AOCS, Champaign, pp 29–42Google Scholar
  24. 24.
    White PJ (1981) Methods for measuring changes in deep-fat frying oils. Food Technol 45:75–80Google Scholar
  25. 25.
    Firestone D, Stier RF, Blumenthal M (1991) Regulation of frying fats and oils. Food Technol 45:90–94Google Scholar
  26. 26.
    Tyagi VK, Vasishtha AK (1996) Changes in the characteristics and composition of oils during deep-fat frying. J Am Oil Chem Soc 73:499–506CrossRefGoogle Scholar
  27. 27.
    Houhoula DP, Oreopoulou V, Tzia C (2002) A kinetic study of oil deterioration during frying and a comparison with heating. J Am Oil Chem Soc 79:133–137CrossRefGoogle Scholar
  28. 28.
    Fournier V, Destaillats F, Juaneda P, Dionisi F, Lambelet P, Sebedio JL, Berdeaux O (2006) Thermal degradation of long-chain polyunsaturated fatty acids during deodorization of fish oil. Eur J Lipid Sci Technol 108:33–42CrossRefGoogle Scholar
  29. 29.
    Augustin MA, Asap T, Heng LK (1987) Relationships between measurements of fat deterioration during heating and frying in RBD olein. J Am Oil Chem Soc 64:1670–1675CrossRefGoogle Scholar
  30. 30.
    Önal B, Ergin G (2002) Antioxidative effects of α-tocopherol and ascorbyl palmitate on thermal oxidation of canola oil. Nahrung 46:420–426CrossRefGoogle Scholar
  31. 31.
    Velasco J, Marmesat S, Marquez-Ruiz G, Dobarganes MC (2004) Formation of short-chain glycerol-bound oxidation products and oxidized monomeric triacylglycerols during deep-frying and occurrence in used frying fats. Eur J lipid Sci Technol 106:728–735CrossRefGoogle Scholar
  32. 32.
    Peers KE, Swoboda AT (1982) Deterioration of sunflower seed oil under simulated frying conditions and during small-scale frying of potato chips. J Sci Food Agric 33:389–395CrossRefGoogle Scholar
  33. 33.
    Pritchard MK, Adam LR (1994) Relationship between fry color and sugar concentration in stored Russet Burbank and Shepody potatoes. Am Potato J 71:59–68CrossRefGoogle Scholar
  34. 34.
    Normand L, Eskin NAM, Przybylski R (2001) Effects of tocopherols on the frying stability of regular and modified canola oils. J Am Oil Chem Soc 78:369–373CrossRefGoogle Scholar
  35. 35.
    Lopez-Varela S, Sanchez-Muniz FJ, Garrido-Polonio C, Arroyo R, Cuesta C (1995) Relationship between chemical and physical indexes and column HPSE chromatography methods for evaluating frying oil. Z Ernahrungswiss 34:308–313CrossRefGoogle Scholar

Copyright information

© AOCS 2008

Authors and Affiliations

  1. 1.Department of Chemistry and BiochemistryUniversity of LethbridgeLethbridgeCanada

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