Determination of free fatty acids in crude vegetable oil samples obtained by high-pressure processes.

This study determined the total acidity, fatty acids profile (TFAs), and free fatty acids (FFAs) present in sunflower and soybean oils obtained by green processes (supercritical carbon dioxide-scCO and pressurized liquid extraction-PLE). The determination of the primary fatty acids responsible for product acidity can provide a higher quality product. Sunflower (scCO/PLE-ethanol) and soybean (PLE-ethanol/PLE-hexane) samples were evaluated.