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The composition of stillingia oil and the presence therein of 2:4‐decadienoic acid
Author(s) -
Devine J.
Publication year - 1950
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740010307
Subject(s) - adulterant , isomerization , chemistry , composition (language) , component (thermodynamics) , oleic acid , linoleic acid , organic chemistry , alkali metal , linolenic acid , food science , fatty acid , biochemistry , catalysis , philosophy , linguistics , physics , thermodynamics
The literature analysis of stillingia oil, which has recently been shown to contain an abnormal spectroscopic component, does not accord with its excellent drying properties. In a re‐examination of a number of commercial samples the abnormal component is shown to be 2: 4‐decadienoic acid, present to the extent of 3% to 6%, and hitherto undetected in naturally occurring oils. This component behaves anomalously during analysis by alkali isomerization, but the effect can be allowed for and the remaining components of the oil are estimated approximately at 40% linolenic, 25% to 30% linoleic, 20% oleic and 9% saturated acids, together with a little conjugated triene acid of the elaeostearic type which is possibly an adulterant. The 2: 4‐decadienoic acid may play a relatively prominent part in the drying and polymerizing properties of stillingia oil.