Thermo Scientific Dionex ICS-5000, Operator'S Manual

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Dionex ICS-5000 Operator’s Manual
66
Doc. 065342-06 12/11
2.13.1 4-Port Valve
The 4-port valve (P/N 074525
)
is the standard injection valve for capillary IC
systems. It is installed in the IC Cube (see Figure 2-18 ). The valve has a
0.4

L internal sample loop. Figure 2-24 shows flow schematics for the 4-port
valve.
•
In the Load position, sample flows from the syringe or autosampler line
(if installed), through the valve, and into the internal sample loop, where
it is held until injection. Excess sample flows out to waste. Eluent flows
from the pump, through the valve, and to the column, bypassing the
sample loop.
•
In the Inject position, eluent flows from the pump, through the internal
sample loop, and on to the column, carrying the contents of the sample
loop with it.
Section 5.3.1 describes how to inject samples with an
autosampler and Section 5.3.2 describes how to inject samples manually.
Figure 2-24. Injection Valve Flow Schematics (4-Port Valve)
LOAD POSITION INJECT POSITION
= Sample
= Eluent
To
Waste
Sample In
To
Column
From Pump
S
W
6
5
2
3
Internal
Loop
To
Waste
Sample In
To
Column
From Pump
S
W
6
5
2
3
Internal
Loop