A kind of preparation method of sesame lignan extract

Abstract

The invention discloses a preparation method of a sesame lignan extract. The preparation method comprises the steps as follows: cold pressed white sesame cake is dried and pulverized into powder, the powder is soaked in an acidified ethanol solution, the mixture is put in an ultrasonic-microwave synergistic extractor for extracting, centrifugation is performed, a supernatant is obtained and subjected to rotary evaporation, and a crude sesame lignin extract is obtained; the acidified ethanol solution is a mixture of a hydrogen chloride standard solution and absolute ethanol; the mixture contains 1%-3% of hydrogen chloride and 88.9%-96.7% of absolute ethanol and the balance of water; the obtained crude sesame lignan extract is extracted with n-hexane at room temperature, extract liquids are combined and subjected to rotary evaporation and concentration to be extract-like, and the sesame lignan extract is obtained. In the preparation process, toxic and harmful organic solvents are avoided; the obtained product does not need fine purification and is lower in cost; oxidative rancidity can be prevented or inhibited, and various health functions of edible oil are increased.

Description

[0001] (1) Technical field [0002] The invention relates to the field of edible oil processing and storage, in particular to a preparation method of sesame lignan extract. [0003] (2) Background technology [0004] The main component of sesame is oil, with a content of about 50%, followed by protein, accounting for about 20%. In addition, it also contains various vitamins, carbohydrates, minerals, dietary fiber and lignan compounds as the characteristic components of sesame. Sesame lignans are the characteristic active ingredients of sesame, mainly including fat-soluble lignans and water-soluble lignans containing glycosides. Fat-soluble lignans include sesamin, sesamolin, sesaminol and sesamol, etc., and their structures are as follows; [0005] [0006] Water-soluble lignans are highly polar glycosides formed by linking the above lignans with 1 to 3 glucose. The mass fraction of lignans in sesame raw materials is 0.5%-1%, and the content of sesamolin in sesame lignans ...

AI Technical Summary

Problems solved by technology

From the effect point of view, the oxidative stability of the added sesame lignan oil is generally not as good as BHT, BHA, TBHQ and other synthetic antioxidants; the cost of directly extracting sesamin from sesame raw materials is high, and the separation and purification steps are cumbersome and complicated. Industrialization, at the same time, there are synergistic effects of various components in anti-oxidation, and a single pure product is often not as good as several mixtures; the existing artificially synthesized lignan components such as sesamol, and the pure product of sesamolin chemically transform sesamol and sesame Vegetarian phenols, toxic and harmful catalysts and organic solvents are unavoidably used in traditional chemical reactions, and there are major problems in the food safety of food antioxidants. In addition, the existing literature generally uses black sesame as raw materials. If the obtained extracts are not followed up Separation and purification, the color of the obtained product is darker, which affects the color of the subsequent edible oil addition

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