Benchtop Freeze Dryers

　In order to ensure the biological activity and quality of the sample, the sample needs to be pre-frozen first, and pre-freezing in a refrigerator or a Benchtop Freeze Dryers to be placed on the shelf of the freeze-drying bin to carry out the main drying process of the sample. At this time, the moisture in the sample is directly sublimated into steam by the low temperature and high vacuum of the Benchtop Freeze Dryers, and is captured by the low temperature cold trap and the vacuum pump. After dozens of hours of main drying, most of the moisture of the sample is sublimated, and the sample is completely retained, and the sublimated gas is condensed into ice in the cold trap. Due to the pressure, gas is sublimated and then The cold trap is condensed into ice. When the ice is sublimated, it absorbs heat, causing the temperature of the sample itself to drop and slowing down the sublimation speed. In order to increase the sublimation speed and shorten the drying time, the product must be properly heated. In order to ensure the higher purity of the sample, the sample can be heated and lyophilized at this time, or the post-drying process can be performed. The sample temperature can reach room temperature, and all lyophilization processes are completed.
　　Advantages of working principle of Benchtop Freeze Dryers
　　1 The substance is always in a low temperature (freezing state) before drying, and the ice crystals are evenly distributed in the substance, and the sublimation process does not cause concentration due to dehydration, thereby avoiding side effects such as foaming and oxidation caused by water vapor.
　　2 The dry material is dry sponge with a porous volume, which is basically unchanged, without shrinkage, and is very soluble in water and returns to the form before lyophilization.
　　3 The principle of ordinary drying is to use heating, but these drying methods are carried out at temperatures above 0 ° C or higher, and the dried products vary greatly in physical and chemical shapes. In the process of freeze-drying, the growth of microorganisms and the action of enzymes cannot be carried out, and the original biological and chemical properties of dry substances are prevented from being largely prevented by Zui, and the stability is good, and it is easy to store for a long time.
　　4 The product is dried, desorbed, and tamponed in a sterile state in the freeze-drying chamber.
　　5 can remove 95% to 99% of the water in the substance.
　　6 It is especially suitable for the dry preservation of heat sensitive substances such as vaccines, strains, poisonous species, blood products and the like.
　　7 The main components of the Benchtop Freeze Dryers have excellent structure layout, which is conducive to transportation, installation and production operations; it is conducive to cleaning and maintenance, and meets GMP requirements.