Refining of Oils Containing Vitamin A

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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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  1. 1

    Fish. Res. Board of Canada, Bull. No. 59, "The Chemistry and Technology of Marine Animal Oils" (ed. by H. N. Brocklesby), 259.

  2. 2

    Estimated by the method of Wesson and Jamieson. Jamieson, G. S., "Vegetable Fats and Oils", 454, 2nd edit.

  3. 3

    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) doi:10.1038/163722b0

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