Do not touch the sample with bare hands while performing the following steps. Doing
so could affect the accuracy of results.
5. Place a sample container on the balance. Tare the balance and allow it to stabilize to zero.
6. Slowly pour the specified amount of sample into the sample container.
7. Remove the rubber stopper from the sample tube.
8. Use the sample tube funnel (provided in the accessories kit) and pour the sample from the
weighing container into the sample tube.
9. On the
Sample Data Worksheet,
record the following:
n
Mass of the sample tube set with the sample.
n
Subtract the
Mass of empty sample tube set
from the
Mass of sample tube set plus
sample.
D
EGAS THE
S
AMPLE
Sample Data Worksheet for Gas Adsorption on page E - 1
After the sample has been weighed, use a degassing unit to remove any contaminants which may
have adsorbed to the surface or pores. Appropriate degassing units are available from
Micromeritics.
After degassing is complete, perform the following steps:
1. Weigh the sample tube set containing the sample.
2. Record the mass on the Sample Data Worksheet as
Mass of Sample tube set plus sample
(After Degas)
.
3. Subtract the
Mass of empty sample tube set (Before Degas)
from the
Mass of Sample tube
set plus sample (After Degas)
to obtain the sample’s mass. Record this value as
Mass of
sample (After Degas)
.
Degas the Sample
Gemini VII Keypad Operator Manual
239-42801-01 (Rev E) — July 2021
2 - 9
