Abstract
The fatty acid, sterol and tocopherol contents of edible oils were used to determine the composition of oil mixtures by means of a weighted least squares estimator with backwards elimination. The model was tested on 93 samples containing known amounts of sunflowerseed oil, groundnut oil, soybean oil, cottonseed oil, maize oil, olive oil and palm oil. Of these samples 75 were binary mixtures, seven were ternary mixtures, one contained seven oils and 10 were pure oils.
Satisfactory results were obtained with 79 of the 93 samples (85%). The differences between the actual and estimated concentrations of the main components were greater than 2.7 times the standard error for six samples; the mean of the absolute differences was 4.7% for all 93 samples. The use of this model is considered superior to the matching of a fatty acid composition, but the model still needs a lot of development.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Joint FAO/WHO Report of the Tenth Session of the Codex Alimentarius Committee on Fats and Oils, London, December 1978.
Spencer, G.F., S.F. Herb and P.J. Gormisky, JAOCS 53:94 (1976).
Kacprzak, J.L., and V.R. Higgins, Anal. Chim. Acta 112:443 (1979).
Spencer, G.F., W.F. Kwolek and L.H. Princen, JAOCS 56:972 (1979).
Gutfinger, T., and A. Letan, Lipids 9:658 (1974).
Van Niekerk, P.J., Proceedings of the Symposium of the South African Association for Food Science and Technology: “Foods and their fats, the science and technology of fats, oils and fatty constituents of foods,” p. 106 (1972).
De Brabander, H.F., and R. Verbeke, Vlaams Diergeneeskd. Tijdschr. 48:4 (1979).
Gargano, A., Industrie Alimentari, July–August 1981.
Parodi, P.W., Austr. J. Dairy Techn. 28:135 (1973).
Imai, C., H. Watanabe, N. Waga and T. II, JAOCS 51:326 (1974).
Derde, M.P., D. Coomans and D.L. Massart, Anal. Chim. Acta 141:187 (1982).
Elliott, S.C., N.A. Hartmann and S.J. Hawkes, Anal. Chem. 43:1938 (1971).
Boe, B., Food Chem. 11:127 (1983).
Spjotvoll, E., H. Martens and R. Volden, Technometrics 24:173 (1982).
Martens, H., F. Paulsen, E. Spjotvoll and R. Volden, in “Data Analysis and Informatics,” edited by E. Diday, North-Holland Publ. Co., Amsterdam, 1980, p. 101.
Burger, A.E.C., L.M. du Plessis, P.J. van Niekerk, S.C.C. Smit and A.U. Bakker, CSIR report “VOED 129” (1983).
Van Wijngaarden, D., Anal. Chem 39:848 (1967).
Ackman, R.G., in “Methods in Enzymology,” Vol. XIV, edited by J.M. Lowenstein, Academic Press, New York, 1969, p. 329.
Itoh, T., T. Tamura and T. Matsumoto, JAOCS 50:122 (1973).
Van Niekerk, P.J. and L.M. du Plessis, S. Afr. Fd. Rev. 3:167 (1976).
Van Niekerk, P.J., M.Sc. Thesis, University of South Africa (1975).
Seber, G.A.F., “Linear Regression Analysis,” John Wiley and Sons, New York, 1977, p. 42.
Tippet, L.H.C., Biometrika 17:364 (1925).
Fedeli, E., Prog. Chem. Fats and other Lipids 15:57 (1977).
Sonntag, N.O.V., in “Bailey’s Industrial Oil and Fat Products,” Vol. 1, edited by D. Swern, John Wiley and Sons, New York, 1979, p. 1.
Seber, G.A.F., “Linear Regression Analysis,” John Wiley and Sons, New York, 1977, p. 84.
Author information
Authors and Affiliations
About this article
Cite this article
van Niekerk, P.J., Burger, A.E.C. The estimation of the composition of edible oil mixtures. J Am Oil Chem Soc 62, 531–538 (1985). https://doi.org/10.1007/BF02542327
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02542327