A low-temperature and low-pressure freeze-drying method for notoginseng chewable tablets

Abstract

The invention discloses a low-temperature and low-pressure freeze-drying method of pseudo-ginseng chewable tablets. The low-temperature and low-pressure freeze-drying method comprises the steps of (1) preprocessing, namely cleaning fresh pseudo-ginseng main roots and draining off the moisture content, slicing and spraying tea polyphenol aqueous solution and sweet aqueous solution onto the pseudo-ginseng slices, (2) pre-freezing, namely putting the pseudo-ginseng slices obtained in the step (1) into a vacuum drier, reducing the temperature to the range of -30 to -40 DEG C and freezing the pseudo-ginseng slices, (3) vacuum freeze-drying, namely vacuumizing the vacuum dryer to keep the pressure within the range of 10-20Pa, keeping for 1-2 hours, heating to increase the temperature to 0 DEG C from the range of -30 to -40 DEG C within 20-30 hours, reheating, and increasing the temperature to 20 DEG C from 0 DEG C within 2-4 hours; taking out the obtained pseudo-ginseng chewable tablets from the vacuum dryer. The low-temperature and low-pressure freeze-drying method of the pseudo-ginseng chewable tablets is low in cost, and capable of effectively keeping the content of effective constituents of the prepared pseudo-ginseng chewable tablets and guaranteeing excellent freeze-dried product appearance and good taste.

Description

technical field [0001] The invention relates to a manufacturing method of notoginseng tablets, in particular to a low-temperature and low-pressure freeze-drying method of notoginseng chewable tablets. Background technique [0002] Sanqi has a planting history of more than 400 years. It is a pearl in the treasure house of Chinese medicine and a treasure recognized both at home and abroad. Panax notoginseng contains dozens of saponins, more than ten kinds of amino acids, more than ten kinds of trace elements, dozens of kinds of volatile oils, notoginseng polysaccharides, notoginseng flavonoids, and various physiologically active substances such as VB and VE necessary for human body. The main active ingredients are easy to decompose at high temperature, resulting in the loss of biologically active substances in Sanqi and reducing the efficacy of Sanqi. Modern medical and pharmacological studies have found that Panax notoginseng has obvious functions of dilating blood vessels, ...

AI Technical Summary

Problems solved by technology

[0003] The notoginseng dried by ordinary methods, the drying temperature is too high, and long-term exposure to the air will lead to the destruction of active ingredients and effective ingredients

In addition, the dried or sun-dried Panax notoginseng is too hard, difficult to crush, inconvenient to use, and the taste is too bitter, which is difficult for many consumers to accept

However, due to the difficulty in transportation and storage of fresh Panax notoginseng, coupled with the restrictions of the purchasing season, and the taste is too bitter, the scope of use of Panax notoginseng is limited.

[0004] At present, there are also some patents in China that use freeze-drying technology to process fresh Panax notoginseng, and the analysis temperature is as high as 120°C, which makes it difficult to maintain the active ingredients of Panax notoginseng

[0005] When the inventor used the existing freeze-drying technology to freeze-dry the Radix Notoginseng tablets, he found that although the loss of R1, Rg1, Rb1 and other components could be reduced by using the existing freeze-drying technology, the Radix Notoginseng tablets after freeze-drying would be deformed or split or Bulging or white spots on the surface cannot keep the raw product intact, which affects the appearance and later sales of freeze-dried Panax notoginseng tablets

In addition, in some methods, panax notoginseng is boiled to kill enzymes before freeze-drying. Due to the existence of high temperature conditions, the loss of R1, Rg1, and Rb1 is also increased.

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