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Appendix A: GlassChem 20 Vessels
Perform a Reaction
WARNING
Proper precautions must be taken to avoid contact with solvents or solvent vapors. Protective gear should
be worn as outlined in the user’s safety program for hazardous materials and the solvent manufacturer’s
safety data sheet. Refer to these guidelines for proper handling and disposal of the solvents.
Vessel Assembly
1. The caps and vent plugs must be conditioned before use. See “New Vessel Tops and Vent Plugs Conditioning”
for details.
2. All vessel components must be dry prior to use.
3. Inspect each vessel for any cracks or scratches. Vessels with cracks or scratches need to be discarded and
replaced because the structural integrity of the vessel can be compromised.
CAUTION
Never add sample or liquid while vessels are in the turntable. Use the vessel holder.
4. Place vessels in vessel holder.
5. Add sample to the vessel(s).
5.1. Place Teon coated magnetic stir bar into the vessel.
5.1. Weigh and place the solids into the vessel.
5.2. Add the solvent. Use the solvent to rinse the inside of the vessel to ensure that the sample is in the
base of the vessel. See “Operating Parameters” for minimum and maximum volumes.
5.3. Ensure that the solvent covers the sample and the base of the vessel.
5.4. Prepare remaining vessels.
CAUTION
All vessels must contain the exact same amount of reaction components and the total volume must
meet the minimum cavity load; 50 mL with medium microwave absorbing solvents and 10 mL with high
microwave absorbing solvents. Contact CEM Corporation before using any low absorbing solvents. See
“Microwave Solvent Chart” for details.
6. Assemble the control cap.
6.1. Install a ferrule on the thermowell so that the tapered end of the ferrule points toward the open end of
the thermowell when fully assembled.
6.2. Install the thermowell with ferrule into the hole in the vent plug by passing the closed end of the ther-
mowell through the hole from the top side of the vent plug.
6.3. Insert the nut into the vent plug and nger-tighten the nut, ensuring the thermowell is fully seated
against the nut.
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