Determination of tri-saturated glycerides in lard, hydrogenated lard, and tallow View Full Text


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Article Info

DATE

1946-12

AUTHORS

F. E. Luddy, R. W. Riemenschneider

ABSTRACT

Crystallization conditions are described which are suitable for obtaining almost quantitative precipitation of tri-saturated glycerides from lard, hydrogenated lard, and tallow.Based on the weight and analysis of the precipitate obtained, a practical method for calculating the amount of tri-saturated glycerides in lard and tallow is proposed. When applied to several hydrogenated lards the method gave constant and reproducible fractions, which contained, in addition to tri-saturated glycerides, considerable amount of “isooleins.” Some uncertainty is attached to the direct application of the method of calculation to these materials because of possible presence of mono-saturated-di-“isooleins.”Several samples of commercial lard examined contained about 2.5% of tri-saturated glycerides whereas a sample of edible tallow contained about 14.0%. The proposed method, when applied to lard, gives results in good agreement with those obtained by the acetone-permanganate oxidation method of Hilditch and Lea. The chief advantage of the crystallization method is that much less time is required for the analysis. More... »

PAGES

385-389

References to SciGraph publications

  • 1946-09. Fractionation of lard and tallow by systematic crystallization in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1945-09. Spectrophotometric determination of small proportions of polyunsaturated constituents in fatty materials in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1941-10. The thiocyanogen values of the methyl esters of oleic, linoleic, and linolenic acids in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
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    http://scigraph.springernature.com/pub.10.1007/bf02543642

    DOI

    http://dx.doi.org/10.1007/bf02543642

    DIMENSIONS

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