ICS-90 Ion Chromatography System
B-32 Doc. 031851-05 12/04
B.15 Equilibrating the System
1. After priming the pump and adjusting the flow rate, leave the pump on and
flush the system for about 5 minutes to equilibrate.
2. Monitor the system pressure from the Control panel to make sure the pressure
is between 107 and 153 MPa (1600 and 2300 psi). If the pressure is less than
107 MPa (1600 psi), gas may be trapped in the system. Release the gas by
opening one fitting at a time from the pump head and along the plumbing to
the column; pay close attention to the line from the pulse damper (see
Figure B-21
).
3. Check that there are no leaks in the regenerant reservoir.
4. Check that liquid is flowing out of the suppressor
REGEN OUT waste line and
that the pressure is stable.
5. Monitor the baseline conductivity. In general, it should be <30
µS for a system
set up for anion analyses, and <2
µS for a system set up for cation analyses.
B.16 Verifying Operational Status
After the system has equilibrated, verify the actual pump pressure and stability by
monitoring the pump pressure. Record the short-term pressure fluctuations; they
should be less than 0.13 MPa (20 psi).
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