Transfer a Degassed Chemical Adsorption Sample to an Analysis Port

 

 

If the sample tube will not be mounted on the analysis port immediately, leave it on the degas port. If it is necessary to remove the sample tube and a Seal Frit was not used, insert a rubber stopper into the sample tube.

  1. Allow the sample tube to cool to room temperature (approximately 15 minutes).
  Do not touch the sample tube or the heating mantle until they have reached room temperature. Touching the sample tube, heating mantle, or heating mantle clip before they have cooled could result in burns.
  1. While holding the sample tube, loosen the port connector nut and remove the sample tube from the degas port. Immediately insert a rubber stopper into the sample tube.
  2. Remove the connector nut, ferrule, and O-ring from sample tube stem.
  3. Weigh the sample tube set. Use the Sample Data Worksheet to determine the sample mass.
  4. Slide an isothermal jacket down over the sample tube stem until it touches the sample tube bulb.
  5. Place the connector nut, ferrule, and O-ring onto the sample tube stem.
  6. Remove the stopper and immediately attach the sample tube to the analysis port, pushing it fully up into the port. Secure it in place by screwing the connector nut onto the analysis port connector.Hand-tighten the connector nut.
  7. Insert the temperature thermocouple in to the clip on the sample tube.
  8. Place the dewar cover over the sample tube stem just above the isothermal jacket.
  9. Place the furnace onto the elevator.
  10. Slide the insulator dewar cover onto the sample tube.
  11. Open the instrument schematic and raise the elevator.
  12. Ensure the insulating dewar cover remains properly seated on the top of the furnace.
 
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