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

Autor(es)

Vicentini-Polette, Carolina Medeiros ^[1] ; Ramos, Paulo Rodolfo ^[1] ; Goncalves, Cintia Bernardo ^[2] ; De Oliveira, Alessandra Lopes ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Anim Sci & Food Engn FZEA, Dept Food Engn, LTAPPN, Av Duque Caxias Norte 225, BR-13635900 Pirassununga, SP - Brazil

^[2] Univ Sao Paulo, Fac Anim Sci & Food Engn FZEA, Dept Food Engn, Memoriam, Av Duque Caxias Norte 225, BR-13635900 Pirassununga, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FOOD CHEMISTRY-X; v. 12, DEC 30 2021.
• Citações Web of Science: 0

Resumo

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(2) and pressurized liquid extraction-PLE). The determination of the primary fatty acids responsible for product acidity can provide a higher quality product. Sunflower (scCO(2)/PLE-ethanol) and soybean (PLE-ethanol/PLE-hexane) samples were evaluated. The TFAs profile was determined by gas chromatography - mass spectrometry. The total FFAs content was determined by titrimetric method. For the qualitative determination of the FFAs present in the oils, a new technique capable of repeatably identifying the main FFAs was applied, using GC/MS. The primary fatty acids (palmitic, stearic, oleic, linoleic, eicosenoic, and linolenic) were present in all samples, both as TFAs and FFAs. However, fatty acids of lesser intensity showed variations. The applied methodology provided relevant data on the FAs that cause acidity in vegetable oils obtained by green processes. (AU)

• Processo FAPESP: 18/18024-7 - Aumento de escala de um equipamento de extração com líquido pressurizado que opera em batelada - estudo dirigido para produção eficiente de tintura de maracujá e óleo de soja usando solventes verdes
• Beneficiário: Alessandra Lopes de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Regular