Abstract
The linoleic acid content of a series of seed fats was determined by the thiocyanometric and the tetrabromide-precipitation methods in a search for isomeric linoleic acids. The results indicated the presence of only one form of linoleic acid. The tetrabromide number was shown to be affected by the pronounced solubility of alpha tetrabromostearic acid in the other bromides and in the solid acids, its determination therefore being of only limited value. The thiocyanogen numbers of pure linoleic and linolenic acids were found to be empirical values differing markedly from the theoretical constants, requiring a revision of the accepted equations for the calculation of the per cent concentration of the unsaturated acids in oils and mixed fatty acids.
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Aided by grants from the National Livestock and Meat Board and the Graduate School of the University. Presented before the 13th convention of the American Oil Chemists’ Society in Chicago, October 6, 1939. Assistance in the preparation of these materials was furnished by the personnel of Work Projects Administration, Official Project No. 65-1-71-140, Sub-project No. 325.
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Kass, J.P., Lundberg, W.O. & Burr, G.O. The linoleic acid content of seed fats and the isomerism of linoleic acid. Oil Soap 17, 50–53 (1940). https://doi.org/10.1007/BF02543047
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DOI: https://doi.org/10.1007/BF02543047