The supercritical fluid extraction experiments were performed using a column type extraction vessel
(Separex-France, Autoclave A21 model) depicted in Figure 1. It consists of an extraction vessel of
100 mL, filled with 20 g of SCG dried, at 60 °C, for 48 hours. The extraction pressure was
controlled by means of a back pressure regulator (lamination) valve. In order to prevent sample
plugging during experiment, the valve’s body was warmed electrically. The gas flow-rate and total
mass of CO2 consumed in the experiment were measured with a gas wet test meter (SIM Brunt) at
room conditions. The extracts were also precipitated and collected into a glass trap, immersed in an
ice bath.