To insert the gas delivery tube, tilt the sample tube nearly horizontal and tap
the tube to open a passageway through the sample. Insert the gas delivery
tube, then tilt the sample tube back to a vertical position and tap the tube to
settle the sample bed around the gas delivery tube.
Figure 2-16. Inserting Gas Delivery Tube Into Sample Tube
3. Insert the stopper loosely into the sample tube. The stopper helps prevent
cool moist air and dust from entering the tube, but it must be inserted
loosely to allow a path for the escaping gas.
It is not necessary to use a stopper with sample tubes having an inside
diameter of only 1/4-in.
4. Place the sample tube in a vacant heating station.
SmartPrep Degassing Samples
Sep 98 2-25
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