Metrohm 882 Compact IC plus – Anion - Manual (Page 85)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 5 Handling and maintenance
882 Compact IC plus – Anion ￭￭￭￭￭￭￭￭ 75
phate sensitivity in less serious cases and a significant rise in the baseline in
more serious cases.
If such capacity problems occur at one or more positions, all suppressor
units must be regenerated with one of the following solutions:
￭ 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%
Caution
The pump tubings made of PVC must not be used for rinsing with solu-
tions containing organic solvents.
We recommend to use the high pressure pump for regeneration.
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 Connecting the suppressor to the high pressure pump
￭ Connect the inlet capillary for the regeneration solution (labeled
with regenerant) to the outlet of the high pressure pump with the
aid of a coupling (6.2744.040)
3 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.
4 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.