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Issue 12, 2019
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Characterisation of peroxidation products arising from culinary oils exposed to continuous and discontinuous thermal degradation processes

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Abstract

High-resolution NMR analysis has been used, for the first time, to identify, putatively, two new secondary aldehydic lipid oxidation products in culinary oils. The impact of heating and cooling times on the thermal stability, fatty acid composition and lipid oxidation product (LOP) concentrations have been analysed for continuous and discontinuous heating periods (180 °C). The susceptibility of the selected oils to thermal oxidation for the different heating episodes has been evaluated via the detection and determination of LOPs, particularly cytotoxic and genotoxic aldehydes. The identities and quantities of these LOPs evolved throughout a 2.0 hour period. Results acquired indicated that sunflower oil was more resistant to discontinuous oxidation than rapeseed and olive oils, however overall discontinuous heating resulted in more LOPs.

Graphical abstract: Characterisation of peroxidation products arising from culinary oils exposed to continuous and discontinuous thermal degradation processes

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Supplementary files

Article information


Submitted
05 Sep 2019
Accepted
18 Nov 2019
First published
19 Nov 2019

This article is Open Access

Food Funct., 2019,10, 7952-7966
Article type
Paper

Characterisation of peroxidation products arising from culinary oils exposed to continuous and discontinuous thermal degradation processes

A. Le Gresley, G. Ampem, M. Grootveld, B. C. Percival and D. P. Naughton, Food Funct., 2019, 10, 7952
DOI: 10.1039/C9FO02065A

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