Equilibrating the System
Doc. 065294-01 3/09
97
19.
Equilibrating the System
1. Turn on the pump and set the flow to the operating rate.
2. Flush the system for about 5 minutes to equilibrate.
3. Monitor the system pressure reading from the Chromeleon Control panel.
The EluGen cartridge requires at least 14 MPa (2000 psi) of system
backpressure for removal of electrolysis gas from the eluent produced by the
cartridge. A system backpressure of 16 MPa (2300 psi) is ideal. If the pressure
is too low, install a backpressure coil (see
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
μ
S for a system
set up for anion analyses and <2
μ
S for a system set up for cation analyses.
Equilibration time varies and it can take some time to reach these expected
values.
19.1
EluGen Cartridge Backpressure Requirements
The EluGen cartridge requires at least 14 MPa (2000 psi) of backpressure
for optimal removal of electrolysis gas from the eluent produced by the
cartridge. During system equilibration (see
system pressure and verify that it is between 14 and 20 MPa (2000 and
3000 psi). A system backpressure of 16 MPa (2300 psi) is ideal.
If the pressure is too low, install a backpressure coil between the injection
valve and the eluent outlet. The backpressure coils listed in the table
below are included in the ICS-2100 Ship Kit (P/N 064375).
The recommended maximum operating pressure for the eluent
generator is 21 MPA (3000 psi). Excessive backpressure may rupture
the tubing in the EGC degas tubing assembly.
