Microwave drying equipment, etc. gradually applied to Chinese herbal medicine drying
At present, the research on the drying process of Chinese herbal medicines mainly focuses on the comparison between traditional drying methods or the comparison between traditional drying methods and modern drying methods. 1. Comparison of the traditional drying methods Comparison of the drying methods are mainly dried, dried, dried, dried and so on. Ding Changjiang et al. from Inner Mongolia University of Technology cut the pretreated oranges into slices of 3-6 mm. They were placed in a high-pressure electric field dryer , a hot-air oven, a natural environment dryer, and a vacuum dryer for drying test. The results showed that the highest content of naringin in the dried tangy orange was high, which was 33.91% higher than vacuum drying, 47.53% higher than that of drying, and 72.88% higher than that of natural drying. The results showed that high-pressure electric field dried orange can retain the active ingredients to the maximum extent, and the drying speed is faster, and the appearance of dried products is better. Zhao Wei, Sichuan University, etc. used 100 °C drying, 50 °C drying, freeze-drying, steaming, drying, vacuum drying, microwave drying 6 methods to deal with wolfberry medicinal herbs, through the comparison of dried products in gardenia and saffron The amount of glycoside-1 is believed to be 50°C. Drying has good effects on the preservation of the two types of components. Freeze-drying, drying under reduced pressure, and drying at 100°C are common. After steaming, drying and drying of microwaves, the jasminoidin Better retention. Guizhou University He Wei, etc. Ginkgo biloba leaves dried indoors, dried in the sun, 80 °C constant temperature drying, 100 °C fixation for 30 minutes and then 80 °C constant temperature drying, placed in a sealed bag mildew (60% moldy site) after The method of drying at a constant temperature of 80°C was used to treat 5 kinds of methods. As a result, it was found that sun-drying can not only effectively reduce the content of ginkgolic acid and reduce the toxic and side effects, but also can well maintain the medicinal components of flavonoids and terpene-lactone in Ginkgo biloba. Drying is the best drying condition among the above 5 commonly used drying conditions. 2. Modern Drying Methods With the advancement of technology, modern drying technologies such as infrared drying, microwave drying, heat pump drying, freeze drying, and solar drying have been gradually applied to the drying of Chinese herbal medicines. Herbal drying equipment The drying process of Panax notoginseng has been dominated by traditional thermal methods, but this method is likely to cause loss of biologically active substances in Panax pseudoginseng and reduce its efficacy. National Water Resources Reserve Bureau Wuxi Research Institute of Science and Design Jiang Shuiquan studied the process flow and characteristics of vacuum freeze-drying. It is believed that this method can avoid the oxidation of active ingredients, volatile oils, and other heat-sensitive substances that have occurred in the traditional thermal drying process of Panax pseudoginseng. Such quality deterioration reaction; and due to the reduction of the chemical reaction rate at low temperature and the passivation of the enzyme, there is almost no browning caused by enzymes and amino acids in the freeze-drying process, so as to ensure the efficacy and quality of dried Qiuqi. High-voltage electric field drying technology is a new type of drying technology. Ding Changjiang and others used the self-developed high-voltage electric field drying equipment to conduct drying tests on five kinds of Chinese Herbal Pieces of Magnolia officinalis, Anemarrhenae, Radix Paeoniae Rubra, Chenpi, and Peppermint, and tested the dried active ingredients. The results showed that the dried five kinds of Chinese herbs in high-voltage electric field dried faster than the hot air 7.7% ~ 42.86%, after drying the active ingredient retained more than 2.7% ~ 30%.
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