Recovery of Gallic Acid with Colloidal Gas Aphrons (CGA)
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Giorgia Spigno
In the present paper the potential application of colloidal gas aphrons (CGA) to the recovery of antioxidants from wine-making waste extracts is investigated. CGA were generated by stirring a buffered solution (400 ml) of a cationic surfactant(cetyltrimethylammonium bromide, CTAB) at 8000 rpm for 10 minutes. Trials were carried out on standard solutions (2 ml) of gallic acid (GA) 200 mg/l with varying volumes of colloidal gas aphrons (20-60 ml) generated with varying concentrations of CTAB (2 and 4 mM). Influence of pH, solvent (buffered aqueous solution and ethanol), CTAB to GA molar ratio on recovery were studied. Best recovery (63%) was achieved from an aqueous solution of GA and at a CTAB to GA molar ratio of 16. Separation is mainly driven by electrostatic interactions but pH conditions are to be optimised to preserve the GA antioxidant power.
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Articles in the same Issue
- Article
- Drying of Red Pepper (Capsicum Annuum): Water Desorption and Quality
- Effect of Emulsifying Salts on Casein Peptization and Apparent Viscosity of Processed Cheese
- Effect of High Pressure and Irradiation Treatments on Hydration Characteristics of Navy Beans
- Sizing of an Innovative and Improved Meat Smoking System
- Parameters Affecting Milling Qualities of Undefatted Soybeans (Glycine max, l. Merill) (1): Selected Thermal Treatment
- Effects of Single and Combined Atmosphere Packages on Preservation of Strawberries
- Shorter Communication
- Recovery of Gallic Acid with Colloidal Gas Aphrons (CGA)
