Freeze-drying For lab, also known as lyophilisation, lyophilization, or cryodesiccation, is a dehydration process typically used to preserve a perishable material or make the material more convenient for transport. Freeze-drying works by freezing the material and then reducing the surrounding pressure to allow the frozen water in the material to sublimate directly from the solid phase to the gas phase.
Here are four stages in the complete drying process: pretreatment, freezing, primary drying, and secondary drying.
Laboratory Freeze-dryers first freezes the material, then the device reduces pressure and adds while heat to allow the movement of water. There are actually 3 main actions: Freezing, Sublimation , Adsorption
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