| 摘要 |
PURPOSE:To prepare an antioxidant with a high content of antioxidant components, by treating a solution extracted from spices with a non-polar organic solvent, with an aqueous solution of alkali, with an acid and then with a non- polar organic solvent to remove unnecessary ingredients effectively. CONSTITUTION:An aqueous solution of alkali (e.g. NaOH) is added to a solution extracted from spices (e.g. olegano, sapori, thyme, sage or rosemary) with a non- polar organic solvent. The resultant water layer is taken out and an acid (e.g. sulfuric acid) is added to it. The a non-polar organic solvent is added and after washing of the solvent layer with water to bring its pH to almost neutral, the solvent is removed, e.g., by heating to the boiling point of the solvent, followed by collection of residues by steam distillation to obtain an antioxidant which is almost free from smell and taste peculiar to spice and has an excellent antioxidant action.
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