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Determination of the fatty acid composition of partially hydrogenated tung oils
Author(s) -
Planck Ralph W.,
Pack Frank C.,
Heinzelman Dorothy C.,
Stansbury Mack F.,
O'Connor Robert T.
Publication year - 1953
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02640972
Subject(s) - iodine value , fractionation , composition (language) , chemistry , iodine , linoleic acid , fatty acid , solvent , organic chemistry , chemical composition , chromatography , philosophy , linguistics
Summary Recently developed spectrophotometric methods for the determination of linoleic and conjugated dienoic acids in the presence of large amounts of eleostearic acid have been applied to the determination of the fatty acid composition of a series of progressively hydrogenated tung oils. Utilizing hydrogen‐iodine values and independently obtained values for saturated fatty acids, it has become possible to calculate concentrations of isolinoleic and of monoethenoic acids. Use of these methods gives a more complete and accurate knowledge of the fatty acid composition of a partially hydrogenated tung oil, or mixture of other oils containing the same types of components, than has been obtainable by previously published spectrophotometric methods. They are also much less time‐consuming than solvent fractionation methods. Data are presented which show the changes in fatty acid composition occurring during the hydrogenation (170°, 5 p.s.i.g. H 2 , 0.1% Ni) of a domestic tung oil from an iodine value of 231 to 78.