Differential scanning calorimetry: a potential tool for discrimination of olive oil commercial categories

Analytica Chimica Acta
Emma ChiavaroAlessandra Bendini

Abstract

Differential scanning calorimetry thermograms of five commercial categories of olive oils (extra virgin olive oil, olive oil, refined olive oil, olive-pomace oil and refined olive-pomace oil) were performed in both cooling and heating regimes. Overlapping transitions were resolved by deconvolution analysis and all thermal properties were related to major (triacylglycerols, total fatty acids) and minor (diacylglycerols, lipid oxidation products) chemical components. All oils showed two well distinguishable exothermic events upon cooling. Crystallization enthalpies were significantly lower in olive oils due to a more ordered crystal structure, which may be related to the higher triolein content. Pomace oils exhibited a significantly higher crystallization onset temperature and a larger transition range, possibly associated to the higher amount of diacylglycerols. Heating thermograms were more complex: all oils exhibited complex exo- and endothermic transitions that could differentiate samples especially with respect to the highest temperature endotherm. These preliminary results suggest that both cooling and heating thermograms obtained by means of differential scanning calorimetry may be useful for discriminating among olive oil...Continue Reading

References

Apr 24, 2002·Palliative Medicine·M C Wright
Nov 28, 2007·Journal of Agricultural and Food Chemistry·Emma ChiavaroGiovanni Lercker
Jan 3, 2008·Journal of Agricultural and Food Chemistry·Emma ChiavaroAlessandra Bendini

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Citations

Feb 8, 2019·Journal of Food Science and Technology·Merly Álvarez HerazoCarlos J Márquez
Nov 8, 2018·International Journal of Food Science·Carla María Blanco-LizarazoRené Miranda-Ruvalcaba
Aug 5, 2021·Critical Reviews in Food Science and Nutrition·Anjali SudhakarCinu Varghese

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