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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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Publication details

The article was received on 05 Sep 2019, accepted on 18 Nov 2019 and first published on 19 Nov 2019


Article type: Paper
DOI: 10.1039/C9FO02065A
Food Funct., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    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, Advance Article , DOI: 10.1039/C9FO02065A

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