1. High pressure extraction of antioxidants from Solanum stenotomun peel.
- Author
-
Cardoso LC, Serrano CM, Quintero ET, López CP, Antezana RM, and Martínez de la Ossa EJ
- Subjects
- Analysis of Variance, Anthocyanins chemistry, Biphenyl Compounds chemistry, Carbon Dioxide chemistry, Ethanol chemistry, Free Radical Scavengers chemistry, Free Radicals chemistry, Hydrophobic and Hydrophilic Interactions, Hydrostatic Pressure, Liquid-Liquid Extraction methods, Phenols chemistry, Phenols isolation & purification, Picrates chemistry, Plant Extracts chemistry, Solvents chemistry, Anthocyanins isolation & purification, Free Radical Scavengers isolation & purification, Plant Extracts isolation & purification, Solanum chemistry
- Abstract
In the work described here, two techniques for the recovery of anthocyanins from potato peel were studied and compared. One of the techniques employed was supercritical fluid extraction (SFE) with pure CO2 or with CO2 and ethanol as cosolvent and the other technique was pressurized liquid extraction (PLE), where the solvent used was ethanol in water acidified to pH 2.6. The effects of pressure and temperature were studied and the anthocyanin contents obtained were statistically analyzed. In SFE the use of low pressure (100 bar) and high temperature (65 °C) was desirable for the anthocyanin extraction. With PLE the anthocyanin contents are increased considerably, and the best yields were obtained at 100 bar and 80 °C. This result is in correspondence with antioxidant activity index values (1.66) obtained in a DPPH antioxidant activity assay. In the extracts obtained with PLE the phenolic compounds were also determined, but the main compounds presented in the extract are anthocyanins.
- Published
- 2013
- Full Text
- View/download PDF