Low pressure extractions
Table 3(A) shows the results obtained from the low pressure extractions with ethanol. It can be noted that Soxhlet provided higher yield than maceration, which can be due to solvent recycle and high temperature, which helps reducing the surface tensionand viscosity, enhancing mass transfer of the solvent into the solid matrix [24–26]. Table 3(A) also shows that the use of ethanol as solvent increases the content of monomeric anthocyanins, phenolics and antioxidant activity, since most of these compounds are polar, and thus they are solubilized more easily in ethanol than in CO2[27].