Micromeritics Gemini VII 2390a, Operator'S Manual

Page: 56 / 426

Preparing for Analysis Gemini VII
3-20 239-42828-01 - Dec 2012
7. Use the sample tube funnel (provided in the accessories kit) and pour the sample from the
weighing container into the sample tube.
8. Replace the rubber stopper (or seal frit).
9. Weigh the sample tube set containing the sample and record the value on the Sample Data
Worksheet as
[B] Sample tube set plus sample mass (Before Degas)
.
10. Subtract the
[A] Mass for empty sample tube set
from the
[B] Mass of sample tube set plus sample
and record this value as the
[C] Sample mass (Before Degas)
.
Degassing the Sample
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. Refer
to
ORDERING INFORMATION
, page
10-1
for ordering information.
If using the SmartPrep degasser, a menu displays on the program menu bar. Degas the sample using
menu commands and information entered in the Degas Conditions window. Refer to the SmartPrep
operator’s manual for operating instructions.
After degassing is complete, perform the following steps:
1. Weigh the sample tube set containing the sample and record the weight on the Sample Data
Worksheet as
[B] Sample tube set plus sample mass (After Degas)
.
2. Subtract the
[A] Mass for empty sample tube set (Before Degas)
from the
[B] Sample tube set plus
sample mass (After Degas)
to obtain the sample’s mass. Record this value as
[C] Sample mass
(After Degas)
.
Funnel