In the present paper the potential application of colloidal gas aphrons (CGA) generated from a cationic surfactant (CTAB) for recovery of antioxidants from wine-making wastes extracts is investigated. Trials were carried out on standard solutions of gallic acid (GA) 200 mg/l. Influence of pH, solvent (ethanol), and of CTAB to GA volume and molar ratios on recovery were studied. Best recovery (63%) was achieved from an aqueous solution of GA at a molar ratio of 16. Separation occurs driven by electrostatic interactions, but pH conditions are to be optimised to preserve the GA antioxidant power.
Spigno, G., Jauregi, P., Recovery of polyphenols from wine-making wastes with colloidal gas aphrons (CGA), <<INTERNATIONAL JOURNAL OF FOOD ENGINEERING>>, 2005; (1(4)): N/A-N/A. [doi:10.1016/S0260-8774(03)00248-6] [https://hdl.handle.net/10807/231741]
Recovery of polyphenols from wine-making wastes with colloidal gas aphrons (CGA)
Spigno, Giorgia;
2005
Abstract
In the present paper the potential application of colloidal gas aphrons (CGA) generated from a cationic surfactant (CTAB) for recovery of antioxidants from wine-making wastes extracts is investigated. Trials were carried out on standard solutions of gallic acid (GA) 200 mg/l. Influence of pH, solvent (ethanol), and of CTAB to GA volume and molar ratios on recovery were studied. Best recovery (63%) was achieved from an aqueous solution of GA at a molar ratio of 16. Separation occurs driven by electrostatic interactions, but pH conditions are to be optimised to preserve the GA antioxidant power.
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