Abstract
THE alkali-refining of fish liver oils containing vitamin A has, in the last few years, acquired increased importance due to the development of molecular distillation. This method of distilling, while yielding concentrates of a high vitamin A content, requires, in order to obtain satisfactory results, oils free from impurities and with low acid-values. Alkali-refining provides the best means of satisfying this requirement; but it has been considered that a treatment of this kind decreases the potency of vitaminic oils because of the adsorption of vitamin A by soaps formed in situ1.
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References
Fish. Res. Board of Canada, Bull. No. 59, "The Chemistry and Technology of Marine Animal Oils" (ed. by H. N. Brocklesby), 259.
Estimated by the method of Wesson and Jamieson. Jamieson, G. S., "Vegetable Fats and Oils", 454, 2nd edit.
B.P. 526,289 granted to K. C. D. Hickman and Distillation Products, Inc.
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HARTMAN, L. Refining of Oils Containing Vitamin A. Nature 163, 722–723 (1949). https://doi.org/10.1038/163722b0
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DOI: https://doi.org/10.1038/163722b0
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