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Verfügbare Sprachen
Verfügbare Sprachen
Regenerating
Standard regeneration solution
0.2 mol/L H
￭
If the suppressor units are loaded with certain heavy metals (such as iron) or organic contamination for long periods,
then the standard regeneration solution may no longer be able to completely remove them. This constantly reduces
the capacity of the suppressor units, which results in reduced phosphate sensitivity in mild cases and a large increase
in the baseline in severe cases.
If these kinds of capacity problems occur at one or more positions, then all suppressor units must be regenerated at
short notice with one of the following solutions:
Regeneration solutions for restoration of suppressor capacity
Contamination with heavy metals or elevated backpressure:
￭
1 mol/L H
SO
2
Contamination with organic cationic complexing agents:
￭
0.2 mol/L H
Heavy contamination with organic substances:
￭
0.2 mol/L H
Contamination by certain environmental samples
￭
1 mol/L H
PO
3
If phosphoric acid has been used once as regeneration solution in an IC system, then you will need to continue
using phosphoric acid for regeneration. Regenerating it with sulfuric acid again can lead to problems in the base-
line.
The MSM can be regenerated either with the peristaltic pump or with a Dosino. To restore the suppressor capacity,
use the same technique as in continuous operation.
The pump tubing has only limited resistance to organic solvents. Insert a new pump tubing after regeneration.
Procedure: Regeneration to restore suppressor capacity with peristaltic pump
1. Replace the regeneration solution for continuous operation with the regeneration solution for restoring the sup-
pressor capacity.
2. Regenerate all 3 suppressor units, one after the other, for approx. 30 minutes using 1 of the solutions men-
tioned above.
a. In the software, set the peristaltic pump to Level 5.
b. In the software, use the Step command to switch to the next suppressor unit.
c. As soon as all three suppressor units have been regenerated, switch off the peristaltic pump.
3. After regeneration, each of the three suppressor units must be rinsed with degassed ultrapure water for about
30 minutes.
a. Replace the regeneration solution with ultrapure water.
b. In the software, set the peristaltic pump to Level 5.
c. In the software, use the Step command to switch to the next suppressor unit.
d. As soon as all 3 suppressor units have been rinsed, switch off the peristaltic pump.
4. Insert a new pump tubing.
5. Replace the ultrapure water with regeneration solution for continuous operation.
Procedure: Dosino regeneration to restore suppressor capacity
1. Replace the regeneration solution for continuous operation with the regeneration solution for restoring the sup-
pressor capacity.
8.0108.8038ML / v1 / 2024-10-31
SO
2
4
+ 0.1 mol/L oxalic acid
4
SO
/ 0.1 mol/L oxalic acid / acetone 5%
2
4
SO
/ acetone ≥ 20%
2
4
4
NOTE
CAUTION
6/16
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