Micromeritics VacPrep Operator's Manual page 36

3 Sample Preparation
10. Blow out the sample tubes with oil-free compressed air.
11. Rinse the sample tube closure with isopropyl alcohol, then wipe the sample tube closure dry
with a clean, lint-free cloth.
12. Label the sample tube and stopper for identification.
13. Replace the rubber stopper.
VacPrep Operator Manual
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061-42802-01 (Rev B) — Apr 2021