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Open AccessArticle

Degradation of Tocopherol Molecules and Its Impact on the Polymerization of Triacylglycerols during Heat Treatment of Oil

1
Department of Gastronomy Science and Functional Food, Faculty of Food Science and Nutrition, Poznan University of Life Sciences, Wojska Polskiego 31, 60-634 Poznan, Poland
2
Department of Biochemistry and Food Analysis, Faculty of Food Science and Nutrition, Poznan University of Life Sciences, Wojska Polskiego 31, 60-634 Poznan, Poland
*
Author to whom correspondence should be addressed.
Molecules 2019, 24(24), 4555; https://doi.org/10.3390/molecules24244555
Received: 25 November 2019 / Revised: 10 December 2019 / Accepted: 11 December 2019 / Published: 12 December 2019
(This article belongs to the Section Analytical Chemistry)
The aim of the study was to analyze the influence of the surface area to volume ratio of pressed and refined rapeseed oils on the changes in tocopherol content and polymerization of triacylglycerols during heating. In the study the pressed and refined rapeseed oil was heated at 170 °C, during 6, 12, and 18 h with three different surface area to volume (s/v) ratios (0.378, 0.189, and 0.126 cm−1). During heating, a decrease in tocopherols and increases in dimers, trimers, and oligomers of triacylglycerols were observed. However, the changes were dependent on the surface area to volume ratio used, type of oil and time of heating. The biggest changes were observed in oil with the biggest s/v ratio (0.378 cm−1), and the lowest when the s/v ratio was 0.126 cm−1. The pressed oil was characterized by faster degradation of tocopherols and slower increase of triacylglycerol polymer levels compared to refined oil. View Full-Text
Keywords: tocopherols; triacylglycerol polymers; thermal decomposition of oil; heat treatment; pressed and refined oils; surface area to volume ratio; size-exclusion chromatography (HPSEC) tocopherols; triacylglycerol polymers; thermal decomposition of oil; heat treatment; pressed and refined oils; surface area to volume ratio; size-exclusion chromatography (HPSEC)
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Kmiecik, D.; Fedko, M.; Siger, A.; Kulczyński, B. Degradation of Tocopherol Molecules and Its Impact on the Polymerization of Triacylglycerols during Heat Treatment of Oil. Molecules 2019, 24, 4555.

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