Micromeritics TRISTAR II PLUS User Manual

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, Check Seal, or TranSeal.
CREATE THE SAMPLE FILE
Create Sample Files on page3 - 2
DETERMINE THE SAMPLE MASS
Sample Data Worksheet for Gas Adsorption on pageE - 1
The equipment images in this topic may differ slightly from your equipment; however,
the instructions are the same unless otherwise noted.
There are several different surface area ranges that require different protocol for optimal results.
n
If there is between 0.1 m
2
and 1 m
2
in the tube, follow the recommendations for balancing the
free space using glass beads, along with filler rods, and measure the resulting free space
difference.
n
If there is between 1 m
2
and 5 m
2
of total surface under test, measure the free space difference
between the two tubes as a part of each analysis.
n
If there is between 5 m
2
and 30 m
2
, use the option to calculate the free space difference
between the two tubes using the density of the sample in the tube, along with the mass entered.
There are some special considerations when using the tubes with the cylindrical bulb on the
end as opposed to the straight-walled tubes.
n
If there is more than 30 m
2
in the tube total, it may not be necessary to determine the free
space difference between the two tubes as a part of the analysis.
Smaller quantities are required for samples having high surface areas. These samples require
careful weighing after degassing because a small error may represent a considerable percent of
total mass. Proper weighing techniques are most important in this case. Use no less than 100 mg
to reduce the effect of weighing errors.
Care should be taken when loading powders: the accessory funnel is useful for this purpose.
Large granules or chunks may be loaded with forceps.
Analysis results are expressed in units of surface area per gram of sample; therefore, it is
important to know the true sample mass.
Create the Sample File
TriStar II Plus Operator Manual
303-42800-01 (Rev M ) — Sep 2023
6 - 5

Micromeritics TRISTAR II PLUS Specifications

General

Brand	Micromeritics
Model	TRISTAR II PLUS
Category	Measuring Instruments
Language	English