Abstract
A method is described for the determination of cyclopropenoid fatty acids in refined and crude cottonseed oils to within 0.01%. It is based upon a stepwise hydrogen bromide titration at 3C and 55C after removal of interfering substances by adsorption on activated alumina. Highly oxidized cottonseed oils first must be converted to methyl esters.
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References
Harris, J. A., F. C. Magne, and E. L. Skau, JAOCS40, 718–720 (1963).
Durbetaki, A. J., Anal. Chem.28, 2000–2001 (1956).
Official and Tentative Methods of the AOCS 2nd ed., rev. to 1962, Am. Oil Chem. Soc, Chicago, 111., Method Ca 9f-57.
Mann, G. E., F. L. Carter, V. L. Frampton, A. B. Watts, and C. Johnson, JAOCS39, 86–90 (1962). $
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So. Utiliz. Res. and Dev. Div., ARS, USDA.
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Harris, J.A., Magne, F.C. & Skau, E.L. Methods for the determination of cyclopropenoid fatty acids. IV. Application of the step-wise HBr titration method to the analysis of refined and crude cottonseed oils. J Am Oil Chem Soc 41, 309–311 (1964). https://doi.org/10.1007/BF02667026
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DOI: https://doi.org/10.1007/BF02667026