Extracción supercrítica de antioxidantes lipofilicos en subproductos de guayaba psidium guajava l

Abstract

Abstract: In the present investigation, we sought to determine the antioxidant capacity and extraction yield in guava (Psidium guajava L) byproducts. The extraction was carried out with supercritical CO2. The particle size of the sample was between 250 - 500 microns, the sample was treated with a flow of CO2 10,000 mL/min for 6 hours. Temperature (35, 40, 45, and 60 °C) and pressure (100, 150, and 200 bars) were varied as study parameters. A yield of 3.45% was determined (P: 150 bar, T: 45 °C). The total phenol content was determined to be 56.6 mg GAE/100 g (P: 100 bar, T: 60°C) using the Folin-Ciocalteu method. The quantification of antioxidant capacity was determined using the ABTS and DPPH methods, the highest values ​​were: 82.11 μmol ET/g (P: 200 bar, T: 35°C) 68.7 μmol ET/g (P : 200 bar, T: 60°C) respectively.