Metrohm 872 Extension Module Suppression – MCS - Manual (Page 45)

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5 Operation and maintenance
872 Extension Module Suppression – MCS
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Regenerating the suppressor
1 Disconnecting the suppressor from the IC system
￭ Disconnect the capillaries of the suppressor labeled with regener-
ant and rinsing solution from the IC system.
2 Regenerating the suppressor
￭ Regenerate the first suppressor unit for about 15 minutes.
￭ In the software, use the Step command to switch to the second
suppressor unit and regenerate this for about 15 minutes.
￭ In the software, use the Step command to switch to the third
suppressor unit and regenerate this for about 15 minutes.
3 Rinsing the suppressor
After regeneration, the three suppressor units must be rinsed with
degassed ultra pure water for about 15 minutes.
￭ Remove the inlet capillary for the regeneration solution (labeled
with regenerant) from the outlet of the high pressure pump.
￭ Connect the inlet capillary for the rinsing solution (labeled with
rinsing solution) to the outlet of the high pressure pump with the
aid of a coupling (6.2744.040).
￭ Rinse the first suppression unit with degassed ultra pure water for
about 15 minutes.
￭ In the software, use the Step command to switch to the second
suppressor unit and rinse this for about 15 minutes.
￭ In the software, use the Step command to switch to the third
suppressor unit and rinse this for about 15 minutes.
4 Connect the suppressor to the IC system
￭ Reconnect the capillaries labeled regenerant and rinsing solution
to the IC system.
5.4.3.3 Cleaning the suppressor
In the following cases, it may be necessary to clean the suppressor:
￭ Increased backpressure onto the connection tubings of the suppressor.
￭ 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).