On the kinetics of the autoxidation of fats: Substrates with conjugated double bonds

Ulla I. Brimberg, Afaf Kamal-Eldin

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

This paper provides a kinetic evaluation of rate data on the oxidation of conjugated linoleic acid methyl esters published by Kern et al. almost 50 years ago. The results of the kinetic analysis suggest that the oxidation of pure substrates with conjugated double bonds in bulk starts with carbon-oxygen cross-linking causing oligomerization (degree of polymerization ≈3). The reaction then proceeds with simultaneous oligomerization and formation of monomeric cyclic peroxides. The oligomerization was described by the empirical equation used previously for oleate and linoleate, which was modified by adding a power term. In contrast to the case of linoleate, hydroperoxides are only minor products in the oxidation of methyl-conjugated linoleate suggesting that micelle formation does not play a significant role in this oxidation.

Original languageEnglish
Pages (from-to)17-22
Number of pages6
JournalEuropean Journal of Lipid Science and Technology
Volume105
Issue number1
DOIs
Publication statusPublished - 2003
Externally publishedYes

Keywords

  • Conjugated linoleic acid
  • Kinetic study
  • Oxidation

ASJC Scopus subject areas

  • Biotechnology
  • Food Science
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

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