Figure 2. Drying apparatus.

A. Schematic illustration of the filtered airstream setup using a gentle airflow within the chemical fume hood. Preassembled OmniTop assembly tubes fitted with pipette tips into the interior of the lid can be conveniently converted into the diagrammed HF removal apparatus. The microcentrifuge tube containing the sample is inserted into a 50 ml centrifuge tube as a secondary container. The air (or nitrogen) stream is then passed through the trap filled with KOH pellets and further bubbled through a saturated base solution to neutralize HF. B. A picture of the actual setup.