Abstract
A rapid (ten minute) and selective method for measuring individual tocopherols found in vegetable oils has been developed using High Performance Liquid Chromatography (HPLC) with ultraviolet absorbance detection. The samples are analyzed directly following dissolution in the mobile phase. α -and γ-tocopherols are quantitated based upon their peak areas relative to standard calibration curves. The measurement of β - and δ-tocopherols in the samples is also based upon the calibration data for the α - and δ-tocopherol standards since the individual β- and δ- standards were unavailable. The data obtained are compared with the total tocopherol content as found by a standard colorimetric procedure. The results indicate the HPLC method to be more reliable in the measurement of samples with high α -tocopherol levels. Soybean, safflower, sunflower, cottonseed, corn, peanut and olive oils have been examined using this method.
Similar content being viewed by others
References
“Analysis and Characterization of Oils, Fats and Fat Products,” Edited byH.A. Boekenoogen, Interscience Publishers, London, England, 1964, pp. 52–53.
“Scientific Status Summary by the IFT Expert Panel,” Food Technology, January 1977, pp. 77–80.
“Bailey’s Industrial Oil and Fat Products,” Edited by Daniel Swern, Interscience Publishers, 1964, pp. 38-41.
“Methods of Vitamin Assay,” Edited by The Association of Vitamin Chemists, Interscience Publishers, New York, 1966, pp. 363–402.
Strohecker R., and H.M. Henning, “Vitamin Assay — Tested Methods,” CRC Press, Cleveland, OH, 1966, pp. 283–308.
Emmerie A., and C. Engel, Recl. Trav. Chim. 57:1351 (1938.
Stern M.H., and J.G. Baxter, Anal. Chem. 19:902 1947.
Bauernfeind J.C., CRC Critical Reviews in Food Science and Nutrition, 8 No. 4:337 (1977).
Waltking A.E., M. Kiernau, and G.W. Bleffort, J. Assoc. Off. Anal. Chemists, 60(4):890 (1977).
Podlaha O., A. Eriksson, and B. Toregard, JAOCS 55:530 1978.
Bollinger H.R., in “Thin Layer Chromatography,” Edited by E. Stahl, Academic Press, Inc., New York, 1957, pp. 229–232.
Seher A., Nehrung, 4:466 1960.
Hartman K.T., JAOCS 54:421 (1977).
Van Niekerk P.J., Anal. Biochem. 52:533 1973.
Matsuo M., and Y. Tahara, Chem. Pharm. Bull. 25(12):3381 1977.
Vatassery G.T., V.R. Maynard, and D.F. Hagen, J. Chrom. 161, 299, 1978.
“Handbook of Chemistry and Physics,” 55th Ed., Edited by R.C. Weast, CRC Press, Cleveland, OH, 1974, p. C512.
Woziwodzki, H., AOAC 67th Annual Spring Meeting, April 1976, Paper No. 146.
Author information
Authors and Affiliations
About this article
Cite this article
Carpenter, A.P. Determination of tocopherols in vegetable oils. J Am Oil Chem Soc 56, 668–671 (1979). https://doi.org/10.1007/BF02660070
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02660070