Thermal decomposition of 12 monovarietal extra virgin olive oils from different geographical origins (eight from Italy, two from Spain, and the others from Tunisia) was evaluated by simultaneous thermogravimetry (TG) and differential scanning calorimetry (DSC) analyses. All extra virgin olive oils showed a complex multistep decomposition pattern with the first step that exhibited a quite different profile among samples. Thermal properties of the two peaks obtained by the deconvolution of the first step of decomposition by DSC were related to the chemical composition of the samples (triacylglycerols, fatty acids, total phenols and antioxidant activity). Onset temperatures of the thermal decomposition transition and Tp values of both deconvoluted peaks as well as the sum of enthalpy were found to exhibit statistically significant correlations with chemical components of the samples, in particular palmitic and oleic acids and related triacylglycerols. Activation energy values of the second deconvoluted peak obtained by the application of kinetic procedure to the first step of decomposition were also found to be highly statistically correlated to the chemical composition, and a stability scale among samples was proposed on the basis of its values.

Thermal decomposition study of monovarietal extra virgin olive oil by simultaneous TG/DSC: relation with chemical composition / VECCHIO CIPRIOTI, Stefano; Cerretani, L; Bendini, A; Chiavaro, E.. - In: JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY. - ISSN 0021-8561. - ELETTRONICO. - 57:(2009), pp. 4793-4800. [10.1021/jf900120v]

Thermal decomposition study of monovarietal extra virgin olive oil by simultaneous TG/DSC: relation with chemical composition.

VECCHIO CIPRIOTI, Stefano;
2009

Abstract

Thermal decomposition of 12 monovarietal extra virgin olive oils from different geographical origins (eight from Italy, two from Spain, and the others from Tunisia) was evaluated by simultaneous thermogravimetry (TG) and differential scanning calorimetry (DSC) analyses. All extra virgin olive oils showed a complex multistep decomposition pattern with the first step that exhibited a quite different profile among samples. Thermal properties of the two peaks obtained by the deconvolution of the first step of decomposition by DSC were related to the chemical composition of the samples (triacylglycerols, fatty acids, total phenols and antioxidant activity). Onset temperatures of the thermal decomposition transition and Tp values of both deconvoluted peaks as well as the sum of enthalpy were found to exhibit statistically significant correlations with chemical components of the samples, in particular palmitic and oleic acids and related triacylglycerols. Activation energy values of the second deconvoluted peak obtained by the application of kinetic procedure to the first step of decomposition were also found to be highly statistically correlated to the chemical composition, and a stability scale among samples was proposed on the basis of its values.
2009
Extra virgin olive oil; monovarietal; triacylglycerols; fatty acids; phenols; thermal decomposition; kinetic analysis.
01 Pubblicazione su rivista::01a Articolo in rivista
Thermal decomposition study of monovarietal extra virgin olive oil by simultaneous TG/DSC: relation with chemical composition / VECCHIO CIPRIOTI, Stefano; Cerretani, L; Bendini, A; Chiavaro, E.. - In: JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY. - ISSN 0021-8561. - ELETTRONICO. - 57:(2009), pp. 4793-4800. [10.1021/jf900120v]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/45860
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