Has anyone got experience of the Freeze Dry Systems Model 7735030?

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Shanker Lal Shrivastava

You may specify the question please.

Edgardo Hernan Avico

When we put the frozen sample (leaf of trees) in flasks, and we conect it to the chamber, the sample thaw in a few minutes, but is necessary that the sample was frozen for a successful lyophilization.

In lyophilization, the frozen sample doesn't thaw. Instead the frozen water i.e., the ice directly vaporizes due to sublimation caused by the temperature-pressure conditions. Thus the liquid phase is bypassed and there is a direct transformation of ice into vapour.