Introduction of the advantages and disadvantages of two different solvents in the extraction tank of traditional Chinese Medicine

The raw material of traditional Chinese medicine extraction tank is usually solid, so the extraction process is liquid-solid extraction, commonly known as leaching, also known as extraction or leaching, that is, the operation of extracting soluble components from solid raw materials with solution [multi-functional extraction tank] key points of extraction solvent of Chinese medicine extraction tank: A It is necessary to have high solubility for effective components and low solubility for impurities B no chemical change with ingredients C the solvent shall be cheap, easy to obtain and safe to use Commonly used Chinese medicine extraction tank solvent: water, ethanol 1 The advantages and disadvantages of extracting solvent from Chinese medicine extracting tank when using water as solvent: A low price, easy access and safe use B polar solvent with strong penetrability to traditional Chinese medicine cells C most of the effective components in the medicinal materials can be extracted Disadvantages: a the medicine with more starch, pectin and mucilage content is easy to be gelatinized and difficult to filter B glycosides can be hydrolyzed easily with water (such as baicalin) C the selectivity of the components is poor, and the impurities extracted are more
d。 The extract is prone to rancidity, deterioration and can not stay for a long time 2 Advantages and disadvantages of using water as solvent: A good solubility, most effective components can be dissolved B strong cell penetration and complete component extraction C It has strong selectivity to the components of medicinal materials (starch, protein, pectin, mucilage and other impurities are not easy to dissolve) more than 90% - extracting volatile oil, organic acid, resin, etc 50% - 70% - most alkaloids and glycosides below 50% - anthraquinones and saponins D The extract is well preserved (more than 20% of them have anti-corrosion function) disadvantages: a the price is more expensive B It has certain physiological activity C flammable and unsafe Hangzhou Yupai Light Industry Machinery Co., Ltd