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. 2021 Aug 15;10(8):1891. doi: 10.3390/foods10081891

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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(a,c) Trends of the concentrations of four main pigments (β-carotene, lutein, pheophytin a and pheophytin b) in two EVOO samples, stored in the dark at T = 22 °C, during time (from about 80 to 800 days after their production): (a) a monocultivar Moraiolo EVOO (sample T2) and (c) a monocultivar Pendolino EVOO (sample T4). (b,d) Values of the concentration (ppm) of lutein during time (t), expressed in days. Symbols refer to values obtained from the deconvolution of the experimental spectra and dashed curves represent the best fitting from exponential analyses (see Equation (7)), as described in the text. (b,d) refer to sample T2 and sample T4, respectively.

(a,c) Trends of the concentrations of four main pigments (β-carotene, lutein, pheophytin a and pheophytin b) in two EVOO samples, stored in the dark at T = 22 °C, during time (from about 80 to 800 days after their production): (a) a monocultivar Moraiolo EVOO (sample T2) and (c) a monocultivar Pendolino EVOO (sample T4). (b,d) Values of the concentration (ppm) of lutein during time (t), expressed in days. Symbols refer to values obtained from the deconvolution of the experimental spectra and dashed curves represent the best fitting from exponential analyses (see Equation (7)), as described in the text. (b,d) refer to sample T2 and sample T4, respectively.