Metrohm 930 Compact IC Flex Oven/ChS/PP/Deg - Manual (Page 92)

5.12 Suppressor
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930 Compact IC Flex Oven/ChS/PP/Deg (2.930.2360)
￭ In the software, use the Step command to switch to the next
suppressor unit and regenerate it as described above.
￭ As soon as all three suppressor units have been regenerated, dis-
connect the capillary labeled regenerant from the coupling.
3 Rinsing the suppressor
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.
￭ 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 suppressor to the IC system
￭ Reconnect the capillaries of the suppressor labeled regenerant
and rinsing solution to the IC system.
￭ Reconnect the outlet of the high-pressure pump to the IC system.
5.12.3.3 Cleaning the suppressor
In the following cases, it may be necessary to clean the suppressor:
￭ Increased backpressure at the suppressor's connection tubing.
￭ Blockage of the suppressor which cannot be eliminated (solutions can
no longer be pumped through the suppressor).
￭ Jamming of the suppressor which cannot be eliminated (suppressor
can no longer be switched over).
Cleaning the suppressor
1 Disconnecting the suppressor from the IC system
￭ Switch off the instrument.
￭ Disconnect all capillaries of the suppressor from the IC system.