Cleaning And Labeling Sample Tubes - Micromeritics ASAP 2020 Confirm Operator's Manual

Preparing Samples
Filler rods help to ensure accuracy in samples with lower total surface areas by reducing the
free-space volume. It is generally a good practice to use filler rods for samples having less
than 100 square meters of total surface area. Filler rods are unnecessary for samples with total
surface areas greater than 100 square meters.
Filler rods can interfere with thermal transpiration correction and, therefore, should
not be used when performing micropore analyses.
The weight of the empty sample tube should be determined after it has been cleaned (refer to
following section), degassed, and filled with backfill gas. The sample tube should be allowed
to cool to room temperature before backfilling. After the sample tube has cooled, remove it
from the degas port and weigh it.
If a seal frit is not used, insert a stopper immediately after removing the sample from
the degas port.
The weight of the isothermal jacket may vary slightly and cannot be considered as constant;
therefore, do not weigh it with the sample tube set.

Cleaning and Labeling Sample Tubes

Sample tubes and filler rods must be clean and dry before samples are added and weighed.
The following procedures are recommended. Refer to the following table for a list of
materials needed to clean and weigh samples properly.
Supplied by Micromeritics
Sample tube
Quartz wool
Sample tube brush
Stoppers for sample tube
Sample tube rack
Sample weighing support
Cloth gloves
Reference material
Funnel
Sample data worksheet
(copied from Appendix A of this manual)
202-42811-01 - Mar 2011
Table 3-1. Materials Required to Clean and Weigh Sample Tubes
Supplied by User
Drying oven
Ultrasonic cleaning unit
Alconox Rubber gloves or lint-free cloth
Acetone or isopropyl alcohol
Cryogen for the cold trap Dewar
Safety glasses
Forceps
Insulating gloves
Waste container
Balance
Pipe cleaners
ASAP 2020 Confirm
3-15