IonPacAS9-SC
034656-06
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D. Disconnect the liquid line from the ASRS-ULTRA
ELUENT OUT
port to the cell at the cell fitting and reconnect it
to the
REGEN IN
port.
E.
Connect a temporary line from the priming block or the low-pressure tee on the isocratic or gradient pump to a
container with a solution of 0.2 M oxalic acid. Pump this solution through the ASRS-ULTRA (4-mm) at 1-2 mL/min
for 30 minutes.
NOTE
Bypassing internal pump manifolds when temporarily pumping high concentration cleaning solutions significantly
reduces the time required to reequilibrate the system to low concentration eluents.
F.
Flush the ASRS-ULTRA with deionized water for 10 minutes.
G. Perform steps A - D of the procedure in Section 4.1, “Small Analyte Peak Areas.”
H. Turn on the SRS Control unit for the
AutoSuppression Recycle or External Water Modes
of operation. Ensure that
the SRS Control unit is
off
for the
Chemical Suppression Mode
of operation.
I.
Flush the ASRS-ULTRA with eluent for 10 minutes.
J.
Reinstall the analytical (and guard) column(s). Begin pumping eluent through the system at the flow rate required for
your analysis and equilibrate the system.
6.2.7 Contaminated Anion MicroMembrane Suppressor, AMMS III
A. Check the regenerant flow rate at the REGEN OUT port of the AMMS.
For the example isocratic applications,
this flow rate should be 3 - 5 mL/min.
B. Check the eluent flow rate.
In general, the eluent flow rate for 4-mm applications, it should be 1.0 mL/min. Refer
to the Anion MicroMembrane Suppressor Product Manual (Document No. 034449-02) for assistance in determining
that the eluent is within suppressible limits.
C. If you are using an AutoRegen Accessory with the MMS, prepare fresh regenerant solution.
Test both the
suppressor and the AutoRegen Regenerant Cartridge for contamination.
1.
If the background conductivity is high after preparing fresh regenerant and bypassing the AutoRegen
Regenerant Cartridge, you probably need to clean or replace your MMS.
2.
If the background conductivity is low when freshly prepared regenerant is run through the MMS without an
AutoRegen Accessory in-line, test the AutoRegen Regenerant Cartridge to see if it is
expended.
Connect the
freshly prepared regenerant to the AutoRegen Regenerant Cartridge. Pump approximately 200 mL of regenerant
through the AutoRegen Regenerant Cartridge to waste before recycling the regenerant back to the regenerant
reservoir. If the background conductivity is high after placing the AutoRegen Accessory in-line, you probably
need to replace the AutoRegen Regenerant Cartridge. Refer to the “AutoRegen Regenerant Cartridge Refill
Product Manual” (Document No. 032852) for assistance.
6.2.8 A Contaminated Anion Atlas Electrolytic Suppressor, AAES
Metal Contaminants or Precipitates
A. Turn off the power to the AAES.
B. Disconnect the analytical (and guard) column(s) from the injection valve and the AAES. Refer to the specific analytical
column Product Manual for column cleanup procedures.
