Spray drying production process of traditional Chinese medicine formula granules
The boiling time of traditional decoction is generally about half an hour, and it is decocted 2~3 times. According to the different medicinal properties of individual pieces, there is a difference between the first and the second.
In the industrialized formula granule production process, in addition to boiling, there are processes of concentration and drying. Therefore, whether the Zui final product is equivalent to the traditional decoction, the production process is a crucial step. Therefore, research on production technology has attracted much attention, and research focuses on extraction, drying and molding processes. Traditional Chinese medicine formula granules are extracted from single-flavored medicinal tablets. They have different effects in different prescriptions, and the chemical components that produce related effects may also be different. Therefore, in the selection of production process, it should be combined with traditional decoction. Comparative studies, such as using a certain or a specific set of ingredients to judge the pros and cons of the process, may lose some of the ingredients and affect the efficacy.
For example, the traditional prescription anti-Huangjiao decoction is a decoction, and only about 9% of tetrandrine can be fried in the decoction. In the anti-Huanghuang granules prepared by the 70% ethanol extraction process, the extraction rate of tetrandrine is as high as 80%, 70% of the ethanol extraction process, and many macromolecular components such as polysaccharides and tannins are difficult to extract, so such a process Whether it is reasonable, whether it is equivalent to the efficacy of traditional decoction, and whether the safety meets the requirements, it is worthy of further study and discussion.
According to the different ingredients contained in traditional Chinese medicine, the extraction and drying granulation processes of the formulated granules vary. Conventional generally adopts decoction or water decoction and alcohol precipitation method, and then evaporates frequently or evaporates under reduced pressure into a clear paste, and the auxiliary materials are mixed and granulated and dried. However, this conventional process is not suitable for some traditional Chinese medicines, such as traditional static boiling extraction and concentration, which will make the volatiles effectively disperse, or some active ingredients will be decomposed by high temperature for a long time, thereby affecting the efficacy; or starch Gelatinization is difficult to handle; the use of alcohol precipitation also causes loss of active ingredients. Therefore, new technologies and new processes such as dynamic extraction, new process of concentration, freeze drying, one-step granulation (fluid granulation / spray drying granulation), etc., are continuously used in the production of formulated granules.
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