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3 cleaning the suppressor – Metrohm 872 Extension Module Suppression – MCS User Manual

Page 45

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5 Operation and maintenance

872 Extension Module Suppression – MCS

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37

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).