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    Home > Active Ingredient News > Drugs Articles > How to make Chinese herbal medicine dry in time to ensure quality?

    How to make Chinese herbal medicine dry in time to ensure quality?

    • Last Update: 2007-01-27
    • Source: Internet
    • Author: User
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    The practice of storing Chinese herbal medicine in warehouse has proved that if the water content of Chinese herbal medicine is controlled within a certain limit under certain conditions, the quality will not change For example, when the water content of jujube is controlled at 12% - 17%, dangshen 11% - 16%, bitter almond 6% - 8%, Beishashen 12% - 15%, Huangqi 11% - 14% and so on, the quality of jujube will change in the process of storage This is the so-called "safe water content" of Chinese herbal medicine, which refers to the critical water content that can make it safe to store under certain conditions without quality variation Therefore, the collected and processed Chinese herbal medicines must be dried to the safe water limit in time to ensure the quality of Chinese herbal medicines At present, there are several commonly used drying techniques for Chinese medicinal materials: the sun drying method is a commonly used drying method for most of the medicinal materials When drying, you should choose sunny and windy weather, spread the medicinal materials thin on the reed mat or cement ground, use the sunlight for lighting, and at the same time, you should pay attention to timely turning to ensure even sunlight At night after autumn, the air humidity is high, so it is necessary to put up and cover the herbs to prevent them from returning to moisture The method of spreading and airing is also called Yin dry method, that is to say, the medicinal materials are placed in the shade of the room or the shed, and the purpose of drying is to use the flowing air to blow away the water This method is often used in rainy weather, or for the medicinal materials containing volatile oil, as well as the medicinal materials that are easy to walk away from oil and change color, such as jujube kernel, cypress kernel, Anemarrhena, bitter almond, dangshen, asparagus, hemp kernel, etc These medicinal materials should not be exposed to the sun They can be spread in places where the sun is not strong or where the air is cool, so as to avoid oil and deterioration The method of drying Kang is a traditional, simple and economic drying method for medicinal materials In order to use this method, one or several rectangular Kang should be built in the room or in the shed in advance The width of the Kang is about 1.5m, and the length can be determined by the number of medicinal materials Under the Kang, a small door that can be opened and closed should be left every 80cm to add fuel Then place a furnace in it, and put an iron plate at the fire mouth of the furnace to raise the fire prevention seedling Destroys the medicinal material, but also disperses the heat When the Kang base is 1.2-1.5m high, a round steel pipe with a diameter of 3-4cm shall be laid horizontally every 60cm The steel pipe shall be laid with a wire mesh, which shall be covered with mud, and then the Kang shall be raised by 60cm from above the mud After Zui, light the stove, dry the Kang and the covered mud, and place the medicinal materials in the Kang trough according to the layer of first large and then small, but do not fill them too full, 30-40 cm thick is suitable, and the top is covered with sacks, straw curtains, etc When there is a large amount of steam rising, open the sack or straw curtain in time, and turn the herbs up and down until the Kang is dry This method is suitable for Rhizoma Chuanxiong, Rhizoma alismatis and Platycodon grandiflorum In the drying process, we should pay attention to the fire to avoid scorching the Kang, and treat them separately according to the nature of the medicinal materials and the requirements for the degree of drying Some medicinal materials should not be dried by the Kang drying method The drying method of drying room and dryer is suitable for large-scale planting base of traditional Chinese medicine It has the advantages of high efficiency, labor-saving and cost saving It is not limited by the weather, but also has the effect of killing insects and mold The temperature can be controlled It is suitable for all kinds of traditional Chinese medicine and does not affect the quality of traditional Chinese medicine It is an advanced drying method However, we should pay attention to the construction of drying room and purchase of special drying machinery in accordance with the technical requirements and standards of the specification, which should be operated by professional personnel familiar with drying technology In addition, the drying temperature and time should be controlled according to the different properties of the medicinal materials Far infrared heating and drying is a new drying technology Its drying principle is to transform electric energy into far infrared radiation, which is absorbed by the molecules of medicinal materials, resulting in resonance, vibration and rotation of molecules and atoms, resulting in the object becoming hot After thermal diffusion, evaporation and chemical changes, Zui finally achieves the goal of "r-drying" This method can be used to dry the seeds, fruits and rice Far infrared drying can save 20% - 50% electric energy, and the effect is good Microwave drying is a new technology which developed rapidly in 1960s In fact, microwave drying is to absorb microwave energy in different degrees by means of induction heating and medium heating, so that the water and fat in traditional Chinese medicine can be converted into heat to achieve the purpose of drying Microwave drying can kill microorganisms and molds, and has the effect of disinfection, so that the medicine can meet the health standards, and can prevent the medicine from mildew and insects in the storage process At present, there are 915MHz and 2450MHz Microwave heating equipment in China.
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