Metrohm 850 Professional IC Anion MCS Prep 3 - Manual (Page 66)

2.18 Metrohm Suppressor Module (MSM)
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850 Professional IC –Anion – MCS – Prep 3
2.18 Metrohm Suppressor Module (MSM)
2.18.1 General information on the MSM
The MSM is used for chemical suppression during anion analysis. It is pres-
sure-stable, robust and resistant to solvents. It consists of 3 suppressor
units in total, which are used for suppression, regenerated with sulfuric
acid or rinsed with ultra pure water in rotation.
Suppression reaction in the MSM
When using a carbonate eluent, the following reaction (amongst others)
occur in the MSM:
R-SO
3
- H + + NaHCO
3
/Na
2
CO
3
➙ R-SO
3
- Na + + H
2
O + CO
2
2.18.2 Connecting the MSM
Caution
To protect the MSM against foreign particles or bacterial growth, a
6.2744.180 pump tubing connection with filter (31-3) must be moun-
ted between the peristaltic pump and the input capillaries of the MSM.
The three inputs and outputs of the suppressor units numbered 1..3 on
the MSM each have 2 fixed mounted PTFE capillaries (see Figure 36, page
57).