IonPac NS1 Manual
Document No. 034024-06
Page 31 of 35
5.5
Small Analyte Peak Areas
Assuming that the suppressor is the cause of this problem, small analyte peak areas are a result of running eluent through the
suppressor with the power off while using the ASRS ULTRA II in the MPIC Suppression Mode or the CSRS ULTRA II in the
AutoSuppression External Water Mode. The problem may also occur in any suppressor while using it in the Chemical Suppression
Mode by not running regenerant through the suppressor chambers.
A. Disconnect the eluent line from the analytical column attached to the
ELUENT IN
port of the Self-Regenerating
Suppressor (SRS) at the analytical column end of the line. Direct this line to a separate waste beaker.
B. Disconnect the eluent line from the
ELUENT OUT
port of the Self-Regenerating Suppressor (SRS) to the detector
conductivity cell at the suppressor end of the line.
C. Install a 10-32 Luer adaptor fitting with a plastic syringe in the
ELUENT OUT
port of the Self-Regenerating
Suppressor (SRS) and inject 5 mL of 0.5 N H
2
SO
4
through the ASRS ULTRA II or 5 mL of 0.5 M NaOH in the reverse
direction to normal flow so that the waste comes out of the
ELUENT IN
port.
D. Reconnect the eluent lines from the
ELUENT IN
port of the Self-Regenerating Suppressor (SRS) to the analytical
column and from the
ELUENT OUT
port of the Self-Regenerating Suppressor (SRS) to the conductivity detector cell
line.
E.
Establish the regenerant flow through the suppressor, turn on the power and begin pumping eluent.
NOTE
If you are operating in the Chemical Suppression Mode, all you have to do is reestablish acid or base regenerant
flow through the suppressor and begin pumping eluent. Allow the system to equilibrate before beginning analysis.
Power is not used in this mode of operation.
