Laboratory Lyophilizer Equipment Vacuum Freeze Dryer Machine for Pharmaceutical-Lab Lyophilizer

There are various drying methods, such as sun drying, boiling drying, drying, spray drying and vacuum drying, but common drying methods are usually carried out at temperatures above 0 ℃ or higher. The dried products generally have the problems of shrinking in size and hardening in texture. Most volatile components will be lost, some heat sensitive substances will be denatured and deactivated, and some substances will even be oxidized. Therefore, there is a great difference in properties between the dried products and those before drying.

The freeze-drying principle is basically carried out below 0 ℃, that is, in the frozen state of the product. The analytical drying is generally not more than 60 ℃. Under vacuum conditions, when the water vapor is sublimated directly, the drug remains in the frozen ice shelf, forming a spongy porous structure, so its volume is almost unchanged after drying. Before reuse, as long as water for injection is added, it will dissolve immediately again.