Metrohm 753 Suppressor Module - Manual (Page 22)

3.1 Handling the suppressor
753 Suppressor Module / 8.753.1003 Instructions for Use
19
3 Operation
3.1 Handling the suppressor
General
The Metrohm Suppressor Module MSM for chemical suppression
installed in the suppressor block consists of a total of 3 suppressor
units which are in turn used for suppression, regenerated with sulfuric
acid and rinsed with water. In order to record each new chromatogram
under comparable conditions a freshly regenerated suppressor unit is
normally used. Switching is either carried out automatically together
with valve switching or manually.
Correct connections
The three inlets and outlets numbered 1...3 on the suppressor each
have 2 permanently mounted PTFE capillaries, which must be con-
nected as described in sections 2.3.2 or 2.4.2 respectively (see Fig. 6).
Flow direction
The suppressor units must never be regenerated with H
2
SO
4
in the
same flow direction used for the eluent. You should thus always install
the inlet and outlet capillaries as described in sections 2.3.2 or 2.4.2
respectively according to the scheme shown in Fig. 6.
Never switch when dry
The suppressor must never be switched in the dry state as there is a
danger of blocking.
No recycling
The recycling process (returning the eluent to the storage vessel)
must not be carried out when the suppressor is in operation.