Stevioside extraction method and application

Abstract

The invention relates to a stevioside extraction method which sequentially includes the steps: multistage extraction; flocculation filtering; desalination and discoloration; concentration; sterilization; drying. The multistage extraction is characterized in that stevia leaf raw materials are extracted fro 2-3 times by the aid of an extraction agent, prepared extracts are collected and combined andused for next step, the extraction agent is provided with thin ethyl alcohol solution with the volume percent of 10-40%, a flocculating agent used in the flocculating process is provided with ferroussulfate solution and calcium oxide, adsorption of an adsorption column is used in the desalination and discoloration process, and washing and desorption are implemented by the aid of alkali, acid, deionized water and 70% of alcoholic solution after adsorption. By the multistage extraction method, the utilization rate of raw materials is increased, an extraction process is relatively simple, production cost is reduced, impurity removal operations such as desalination and discoloration of extracted crude products are implemented in the preparation process, the purity of a final product is effectively ensured, and subsequent production and use of the finally prepared product can be directly implemented.

Description

technical field [0001] The invention relates to an extraction method, in particular to an extraction method of plant active ingredients, more specifically, to an extraction method of steviol glycosides in stevia leaves. Background technique [0002] Stevia, also known as Stevia sugar, is an extract of Stevia rebaudiana leaves. It does not contain sugar and calories, and has no obvious toxic and side effects. It can inhibit high blood sugar and high blood pressure, and has anti-inflammatory and antidiarrheal properties. Diuretic, assist immune regulation and so on. Steviol glycoside (Stevia) is specifically a kind of sweet terpene glycoside, with white to yellowish color, pleasant taste and no peculiar smell. It is a new sugar source with broad development prospects. At present, it is widely used in industries such as cosmetics, food and medicine. [0003] In the article "Research on the Extraction and Purification Process of Stevioside", the extraction process of steviosid...

AI Technical Summary

Problems solved by technology

Although the jelly prepared by this method has unique flavor, moderate elasticity and toughness, and has health care and beauty effects, but the rich raw materials and sugar contained in the jelly are easy to remain after eating, and there is a certain hidden danger to oral health.

[0009] Chinese patent publication CN108210385A discloses a jelly mouthwash with anti-caries, antibacterial and root-fixing effects. The mouthwash contains moisturizing ingredients, solvents, acid-base buffers, anti-caries ingredients, root-strengthening ingredients, flavoring ingredients, and antiseptic ingredients. etc., and the anti-caries composition is a chemically synthesized substance with a complex structure. Although the mouthwash has the effects of anti-caries, antibacterial and root-fixing teeth, the chemically synthesized composition contained in the mouthwash has certain potential safety hazards. , and the mouthwash needs to be used alone, and cannot achieve the dual effects of supplementing nutrients and improving oral health at the same time

Images