BUCHI Wet Digester B-440 - Manual (Page 21)

6 Operation
21 B-440 Operation Manual, Version D
6.2 Preparing for use
During the preparation process, handling with strong acid and other potentially dangerous substances
will be inevitable. Thus, all steps must be performed under safe laboratory conditions!
Prerequisites
All parts must be clean and free of damage. s
To achieve a reliable and reproducible digestion result, the quality of sample material and additives s
(e.g. acids) must be free of impurities and of adequate amount.
6.2.1 Filling of the condensate trap (optional)
Fill condensate trap with activated charcoal granules. Use glass wool as a barrier for the charcoal. To
prevent the glass wool causing a blockage, the glass wool should only be inserted very loosely!
Glass wool layers
Activated charcoal filling
NOTE
Activated charcoal is available on the open market by various companies. A granule size of approx.
2.5 mm is convenient.
Installation of the condensate trap (optional)
Install both elbow connectors at the ends of the condensate trap. Join each connector with a clamp
and place the trap with the tube connections upwards into the bracket at the rear side of the digester
housing.
NOTE
When no condensate trap is needed, the Scrubber must be directly connected to the glass hood.