Metrohm 850 Professional IC Anion MCS Prep 3 - Manual (Page 111)

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4 Operation and maintenance
850 Professional IC –Anion – MCS – Prep 3
￭￭￭￭￭￭￭￭ 101
cant rise in the baseline in more serious cases. If such capacity problems
occur at one or more positions, the suppressor units must be regenerated:
Regenerating the MSM
Regenerate the MSM as follows:
1 Disconnecting the MSM from the IC system
￭ Disconnect the MSM from the separation column and detector.
2 Regenerating the MSM
Caution
The pump tubing made of PVC must not be used for rinsing with
solutions containing organic solvents. In this case, other pump
tubing must be used for rinsing.
Note
The high pressure pump can be used for regeneration. For this,
remove the guard column and separation column and connect the
capillary directly to the MSM (regenerate in opposite direction).
￭ Rinse the 3 suppressor units with the following solutions for
about 15 minutes each:
– Contamination with heavy metals:
1 mol/L H
2
SO
4
+ 0.1 mol/L oxalic acid
– Contamination with organic cationic complexing
agents:
0.1 mol/L H
2
SO
4
/ 0.1 mol/L oxalic acid / acetone 5%
– Severe contamination with organic substances:
0.2 mol/L H
2
SO
4
/ acetone ≥ 20%
3 Connecting the MSM to the IC system
￭ Reconnect the MSM to the IC system. If the capacity problems
remain, MSM rotor A must be replaced (see Chapter 4.13.3.3,
page 104).