11. The sample tube should be cool enough to handle after several minutes. Remove the tube
from the cooling station. Hold the stopper loosely in the tube and slowly pull out the gas
delivery tube.
12. As the gas delivery tube clears the stopper, press the stopper into the sample tube to seal
the tube against contamination.
13. Place the VAC/GAS control knob in the OFF position.
14. Wipe the gas delivery tube with a clean, lint-free cloth to remove any particles of sample that
may have adhered to it. Then place the gas delivery tube in a cooling station until needed
again.
15. Reweigh the sample tube with stopper and sample to ensure that the correct sample mass
is recorded.
The weight recorded at this step may be compared to the weight recorded before
preparation to determine if adequate degassing has occurred.
Flowing Gas Preparation
VacPrep Operator Manual
061-42802-01 (Rev B) — Apr 2021
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