Sample Preparation VacPrep 061
2-6 Feb 2013
10. After degassing the empty sample tube, install the stopper and weigh it while it still
contains inert gas.
Weighing Samples
1. Place the sample weighing support on the balance. Zero the balance and allow it to
stabilize.
2. Place the sample tube with stopper on the sample weighing support. Record the stabilized
weight as empty sample tube weight. Then remove the sample tube with stopper and the
weighing support.
3. Place an empty sample weighing container on the balance. Zero the balance and allow it to
stabilize.
4. Slowly add the sample to the weighing container. Record the weight as sample weight.
5. Remove the rubber stopper from the sample tube.
To get an accurate weight of a degassed sample, the gas in both the empty sample
tube and in the tube when it contains the sample must be the same.
Do not touch the sample with bare hands while completing Step 4. Doing so could
affect the accuracy of results.
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