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Journal of Lipid Research, Vol. 4, 91-95, January 1963
Copyright © 1963 by Lipid Research, Inc.

Precursors of methyl ketones in butter

B. van der Ven , P. Haverkamp Begemann , and J. C. M. Schogt

Unilever Research Laboratory, Vlaardingen, The Netherlands

Butterfat, when treated with Girard-T reagent, yields a series of six pyrazolones, corresponding to six even-numbered ßbeta;-ketoacids (C₆ up to and including C₁₆). This is in agreement with the formation of six odd-numbered methyl ketones (C₅ up to and including C₁₅) on subjecting butterfat to steam-deodorization. The presence in butterfat of nonvolatile ßbeta;-ketoacid esters has been proved. If they are glycerides, their amount is estimated at 0.03%.

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