5.3 Metrohm Suppressor Module (MSM)
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942 Extension Module Vario SeS/PP (2.942.0500)
3 Rinsing the Metrohm Suppressor Module (MSM)
After regeneration, each of the three suppressor units must be rinsed
with degassed ultrapure water for about 15 minutes.
￭
Connect the capillary labeled
rinsing solution
to the outlet of
the high-pressure pump using a coupling (6.2744.040).
￭
Set the flow of the high-pressure pump to 0.5 mL/min in the soft-
ware.
￭
Connect the ultrapure water to the high-pressure pump.
￭
Switch on the high-pressure pump.
If the pressure decreases during rinsing, slowly increase the flow
of the pump to a maximum of 2 mL/min. When doing so, make
sure that the pressure does not exceed 2 MPa!
￭
After approx. 15 minutes, switch off the high-pressure pump.
￭
In the software, use the
Step
command to switch to the next
suppressor unit and rinse it as described above.
￭
As soon as all three suppressor units have been rinsed, disconnect
the capillary labeled
rinsing solution
from the coupling.
4 Connecting the Metrohm Suppressor Module (MSM) to the
IC system
￭
Reconnect the capillaries of the MSM labeled
regenerant
and
rinsing solution
to the IC system.
￭
Reconnect the entry and the exit of the high-pressure pump to
the IC system.
5.3.3.3
Regenerating the cation suppression rotor
If the cation suppressor units are exposed to certain contaminations for
prolonged periods, then these contaminations can no longer be removed
completely with the standard regeneration solution. The performance of
the suppressor units declines continuously, as indicated by a rise of the
baseline or asymmetrical peaks.
If such problems occur at one or more positions, then treat all of the cat-
ion suppressor units as follows:
Regenerating the cation suppressor
1 Stopping the regeneration solution
Stop the regeneration solution feed.