Oxidation of Methyl Linoleate Mixed with Methyl Octanoate, Laurate or Palmitate

Abstract

The oxidation process of methyl linoleate mixed with methyl octanoate, laurate or palmitate at the molar ratio of 1:1 was measured at 65℃ . Methyl linoleate with methyl octanoate was oxidized most rapidly, and the oxidation of the substrates mixed with methyl laurate and palmitate followed. Methyl linoleate was mixed with methyl laurate at the molar ratios of 1:3, 1:1 and 3:1, and its oxidation processes were measured. The methyl linoleate mixed at the lower ratio (1:3) was the most retarded. The oxidation processes were well simulated based on the kinetic equation of the autocatalytic type in consideration of the independent evaporation of methyl octanoate, laurate or palmitate.

Engineering aspects of rate-related processes in food manufacturing

“…The rate constants for the linoleic acid mixtures were proportional to the molar fraction of linoleic acid alone, 47) while the same applied to mixtures of methyl linoleate with methyl octanoate, laurate, or palmitate, given the independent evaporation of the additional compounds. 48) When two PUFAs or their esters were mixed, oxidation of the less oxidatively stable PUFA accelerated as its content in the mixture decreased, while oxidation of the more oxidatively stable PUFA slowed with decreasing content. 49) When two polyunsaturated acylglycerols were mixed, one would dilute the other, though the decomposition products would accelerate the process.…”