Name / equipment:
/ Brand: VirTis SP Scientific
usage: Freeze dryer is used for drying of samples that contain solvents
with high boiling points (like water and glycols) and cannot be dried at
higher temperatures, because they are unstable at high temperatures.
Freeze dryer is used only for sample preparation.
limitations: Samples should not decompose if they are deeply frozen. Light
volatile organic solvents should be removed before freeze drying of
samples. Melting point of solvent of freeze dried samples should be above
application conditions: Samples can be freeze dried either at room
temperature or at -50°C. Freeze drying times depend on quantity of samples
and procedure has to be repeated several times if samples are not