Oritron Dionex Ion Chromatography System ICS-2100 - Manual (Page 55)

2 • Features
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syringe or automated sampler line (if installed), through the valve,
and into the sample loop. Excess sample flows out to waste.
•
In the Inject position, sample is swept to the column for analysis.
Eluent flows from the pump, through the sample loop, and on to the
column, carrying the contents of the sample loop with it.
Section 3.10
describes how to inject samples.
Figure 2-19 shows the injection valve connections. The injection valve is
plumbed at the factory with all tubing and fittings for connection to the
pump, injection port, column, and waste. A 25-
μL PEEK ™
sample loop
(P/N 042857) is installed between ports L (1) and L (4). Dionex offers
sample loops in various sizes. If necessary, the pre-installed 25-
μL loop
can be replaced with a loop that has a different sample injection volume.
NOTE 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 system backpressure is too low, install a
backpressure coil. Connect one end of the backpressure
coil to port P (2) on the injection valve; connect the other
end to the
TO INJ VALVE IN - P line. See Section B.17.1
for details.
Figure 2-19. Injection Valve Plumbing