Thermo Scientific Dionex ICS-2000, Operator'S Manual

Page: 45 / 390

2 • Features
Doc. 031857-03 4/06
2-25
Flow Description for KOH, LiOH, MSA, or NaOH Eluent Generation
Refer to Figure 2-13 for the flow path number locations.
•
Deionized water from the reservoir
n
flows first through the pump degas
assembly and then through the eluent valve
o
to the pump
p
. The water is
then pushed through the pressure transducer
q
, which measures the system
pressure. From there, the water flows through a pulse damper
r
, which
smooths minor pressure variations from the pump to minimize baseline noise.
•
Water then flows into the EluGen cartridge (EGC)
s
, which generates the
programmed concentration of eluent. Eluent exits the cartridge and flows
through the CR-TC
t
(which traps ionic contaminants), through the EGC
degas tubing assembly
u
, and on to the injection valve
v
.
•
After sample is loaded into the sample loop
w
and the injection valve is
toggled to the Inject position, eluent passes through the sample loop.
•
The eluent/sample mixture is pumped through the heat exchanger , which
heats the mixture to the column heater temperature. The mixture then goes to
the guard and separator columns
and through the suppressor .
•
From the suppressor, the mixture flows through the cell , where the analytes
are detected. A digital signal is sent to Chromeleon software. Analog output
can be collected simultaneously.
•
The mixture flows out of the cell and is recycled back into the suppressor ,
where it is the water source for the regenerant chamber.
•
Regenerant waste from the suppressor is directed back to the CR-TC , and
then to the EGC degas tubing , where any released hydrogen or oxygen gas
is removed before it is sent to the gas separator assembly and then to waste .
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