Metrohm 833 IC Liquid Handling Unit - Manual (Page 43)

5.2 Handling the suppressor module
833 IC Liquid Handling Unit / Instructions for Use 8.833.1003
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5.2 Handling the suppressor module
General
The Metrohm Suppressor Module MSM of the 833 IC Liquid
Handling Suppressor Unit consists of a total of three suppressor
units, which are used in sequence for suppression, regenerated with
sulfuric acid and rinsed with water. In order to be able to record each
chromatogram under comparable conditions, work is normally carried
out with a freshly regenerated suppressor. Switching takes place either
automatically together with the valve switching or manually.
Correct connection
The three suppressor inlets and outlets numbered 1 … 3 each have two
permanently attached PTFE capillaries that must be connected as
described in Section 5.1 (see Fig. 10).
Flow direction
The suppressor units must never be regenerated with H
2
SO
4
in the
same direction as which the eluent is transported. This is why the inlet
and outlet capillaries must always be mounted as described in
Section 5.1 and shown in Fig. 10.
Never switch to the next position when dry
The suppressor module must never be switched to the next position
when it is dry, as there is a risk that it could be blocked.
No recycling
The recycling method (return of the eluent to the storage container)
must not be used with the suppressor.