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Functional group analysis during ozonation of sunflower oil methyl esters by FT-IR and NMR by Nestor U Soriano Jr; Veronica P Migo; Masatoshi Matsumura is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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Ozonation of neat sunflower oil (SFO) methyl esters was monitored by FT-IR and 1 H and 13 C NMR spectroscopy. During the early stage of ozonation, ozone absorption was essentially quantitative. This was accompanied by the formation of 1,2,4-trioxolane. IR and NMR spectra of ozonated samples showed that scission of ozonide to give aldehyde were minimal. 1 H NMR analysis revealed that the amount of ozonide relative to aldehyde was more than 90% regardless of the extent of ozonation. Complete ozonation was attained after supplying around 0.20 g O 3 /ml methyl ester after which ozone absorption suddenly dropped to around 25%. At the latter part of ozonation, ozonide and aldehyde reacted with excess ozone to give carboxylic acid. Reaction products were identified according to Criegee mechanism.

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Author

Nestor U Soriano Jr; Veronica P Migo; Masatoshi Matsumura

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0009-3084)

Published

2003

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)