エルカ酸メチルの空気酸化から生ずる揮発性カルボニル化合物について

抄録

In the previous paper, authors identified the volatile carbonyl compounds evolved from rape-seed oil by the oxidation with dried air.
In this paper, methyl eruciate was synthesized from erucic acid which is the main component of fatty acids in rape-seed oil, and was oxidized with dried air at 96±1°C, according to the procedure previously described.
The volatile carbonyl compounds come from methyl eruciate in each oxidation period were identified by means of paper chromatography and ultra-violet absorption spectra.
Experimental results were as follows :
1) The carbonyl compounds from methyl eruciate were mostly evolved in the oxidation periods from 36 to 48 hours and most part of that was carbonyl compounds having C₁₀ to C₁₄ carbon number.
2) With the progress of oxidation, the proportion of saturated carbonyl compounds in the fraction having C₂C₄ and C₆C₈ carbon number increased, while in carbonyl compounds having C₁₀ to C₁₄ fraction, the proportion of unsaturated carbonyl compounds were increased after the oxidation period of 36 hours.
3) A small amount of aliphatic ketones appeared simultaneously during oxidation, and it was 8% by weight for the interval of 24 to 36 hours oxidation.