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Effect of thioanisole and trimethylene sulfide on the oxidation and yellowing of methyl linolenate
Author(s) -
Kumarathasan Rajkumar,
Chaudhuri Satya N.,
Hunter Norman R.,
Gesser Hyman D.
Publication year - 1992
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02637696
Subject(s) - thioanisole , autoxidation , chemistry , sulfide , photochemistry , absorbance , dimethyl sulfide , organic chemistry , catalysis , sulfur , chromatography
The effect of thioanisole and trimethylene sulfide on the autoxidation and yellowing of methyl linolenate has been investigated by nuclear magnetic resonance (NMR) and ultraviolet visible spectroscopy, respectively. The progress of autoxidation was followed by measuring the NMR integration of vinylic protons with respect to methoxy protons, which served as the internal standard, as a function of time. The degree of yellowing was determined by measuring the difference in absorbance at 400 nm and 450 nm as a function of time. Both thioanisole and trimethylene sulfide enhanced the autoxidation of methyl linolenate. Inhibition of yellowing was observed only with trimethylene sulfide.