Kinetics of linoleate oxidation in model systems

T. P. Labuza, H. Tsuyuki, M. Karel

Research output: Contribution to journalArticlepeer-review

96 Scopus citations

Abstract

Oxidation of methyl linoleate, trilinoleate and linoleic acid has been studied in model systems based on various solid supports. Oxidation was followed by measurement of oxygen absorption, peroxide values and products of oxidation as a function of moisture equilibrium relative humidity. Effects of various metals, histidine and the antioxidants propyl gallate and butylated hydroxytoluene were studied. The results indicate: (a) at 50 C oxidation of protein increases with increasing moisture content and the protein interacts with peroxides changing the overall oxidation rate; (b) increasing moisture content shows the same inhibitory effect on oxidation of trilinoleate as it does on methyl linoleate; (c) the effectiveness of antioxidants is increased with increasing humidity but some chelating agents complexed with metals become catalytic at the higher moisture content; and (d) at moisture contents in the region of capillary condensation, mobility of reactants is enhanced since the rate of oxidation increases significantly.

Original languageEnglish (US)
Pages (from-to)409-416
Number of pages8
JournalJournal of the American Oil Chemists' Society
Volume46
Issue number8
DOIs
StatePublished - Aug 1 1969
Externally publishedYes

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