Summary
Thiocyanogen values were determined on the methyl esters of oleic, linoleic and linolenic acids and on six different mixtures of these esters, using 0.1 and 0.2 normal thiocyanogen solutions. The values determined with 0.1 N solutions showed less variation than those determined with 0.2 N.
The composition of the mixtures calculated from equations based on the found thiocyanogen values of the esters agreed with the known composition within reasonable limits. Comparisons were made with the composition calculated with the Kaufmann-theory values.
It is suggested that the F.A.C. consider adopting tentatively the values 89.4 for oleic acid, 93.9 for linoleic acid, and 162.0 for linolenic acid when 0.1 N thiocyanogen solutions are used; the values 89.4, 96.8, and 167.5 when 0.2 N solutions are employed. These represent the average of the values for these acids which have been reported in the literature.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Bibliography
Kaufmann, H. P., Z. Unters. Lebensm.,51, 157 (1926).
van Loon, J., Chem. Umschau.,38, 279 (1931).
van der Veen, H., and van Loon, J., Chem. Umschau,39, 56 (1932).
Gay, P. J., J. Soc. Chem. Ind.,51, 126T (1932).
Shinowara, G. Y., and Brown, J. B., J. A. C. S.,60, 2734 (1938).
Riemenschneider, R. W., and Wheeler, D. H., Oil & Soap,16, 219 (1939).
Wheeler, D. H., Riemenschneider, R. W., and Sando, C. E., J. Biol. Chem.,132, 687 (1940).
Kass, J. P., Loeb, H. G., Norris, F. A., and Burr, G. O., Oil & Soap,17, 118 (1940).
Irwin, W. H., et al, Committee on Analysis of Commercial Fats and Oils, Ind. Eng. Chem., Anal. Ed.,8, 233 (1936).
Hilditch, T. P., and Murti, K. S., Analyst,65, 437 (1940).
Riemenschneider, R. W., Wheeler, D. H., and Sando, C. E., J. Biol. Chem.,127, 391 (1939).
Kimura, W., Fettchem. Umschau.,42, 78 (1935).
Annon., Jour. A. O. A. C.,21, 87 (1938).
Waterman, H. I., and Bertram, S. H., and van Westen, J. Soc. Chem. Ind.,48, 50T (1929).
Kimura, W., J. Soc. Chem. Ind., Japan,32, 141 B (1929).
Kass, J. P., Lundberg, W. O., and Burr, G. O., Oil & Soap,17, 50 (1940).
Author information
Authors and Affiliations
Additional information
Agricultural Chemical Research Division Contribution No. 15
About this article
Cite this article
Riemenschneider, R.W., Swift, C.E. & Sando, C.E. The thiocyanogen values of the methyl esters of oleic, linoleic, and linolenic acids. Oil Soap 18, 203–206 (1941). https://doi.org/10.1007/BF02544183
Issue Date:
DOI: https://doi.org/10.1007/BF02544183