Extraction of polyphenols from cocoa seeds and concentration through polymeric membranes

Red Wine Extract Obtained by Membrane-Based Supercritical Fluid Extraction: Preliminary Characterization of Chemical Properties.

“…The total polyphenols extraction was quantified using the Folin-Ciocalteu method (Sarmento et al, 2008) at 760 nm. The concentration of phenolic compounds in was calculated using Gallic acid standard solutions between 5 and 55 µg mL -1 and the measurement were carried out in duplicate.…”

“…In terms of food classification, some foods and beverages are not classified as functional, but these contain active substances of natural origin and may provide the same benefits offered by functional foods like green tea, chocolate and red wine (Sarmento et al, 2008).…”

Supercritical Carbon Dioxide and Subcritical Water: Complementary Agents in the Processing of Functional Foods

“…The system, operating on a pilot scale at atmospheric pressure 8 and 15 MPa, at 40 • C, produced a maximum yield of polyphenols of approximately 42.8% when a pressure of 8 MPa was maintained (Sarmento et al 2008). Recently, antioxidant compounds from grape products have been recovered via the coupling of SFE and membrane technology (Beltran et al 2008).…”

Effect of dense CO2 on polymeric reverse osmosis and nanofiltration membranes and permeation of mixtures of macauba oil (Acrocomia aculeata) and CO2

“…supercritical) CO 2 has become a great alternative to replace organic solvents in the extraction of solute molecules, due to the tuneable dissolving power of CO 2 [3,4]. One of the main issues in high-pressure applications is the recovery of the supercritical fluid, which represents the major part of the operational costs [5].…”

“…Studies report that different membranes made of polyvinyl alcohol (PVA) and a polyamide copolymer (IPC) were available with a good CO 2 permeability and offer possibilities for efficient regeneration of carbon dioxide while maintaining supercritical conditions [7]. Sarmento et al [3] verified that the polymeric membranes used (DL, HL -Osmonics and NF -Dowfilmtec) showed a good mechanical resistance and good permeability values for pure supercritical CO 2 and for its mixture with cocoa extract. The polyphenol retention index for these membranes were all greater than 90% when subject to a pressure differential of 10 bar.…”