Metrohm 881 Compact IC pro – Anion - Manual (Page 60)

3.16 Metrohm Suppressor Module (MSM)
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881 Compact IC pro – Anion
3.16 Metrohm Suppressor Module (MSM)
The MSM is used for chemical suppression during anion analysis with con-
ductivity detection or UV/VIS detection. It consists of 3 suppressor units in
total, which are, in rotation, used for suppression – regenerated with
100 mmol/L sulfuric acid – rinsed with ultrapure water.
Suppression reaction in the MSM
When using a carbonate eluent, the following reaction (amongst others)
occurs in the MSM:
2R-SO
3
- H + + Na
2
CO
3
➙ 2R-SO
3
- Na + + H
2
O + CO
2
3.16.1 Connecting the suppressor
The three inputs and outputs of the suppressor units, numbered with 1, 2
and 3 on the connecting piece, each have 2 fixed mounted PTFE capilla-
ries.