Metrohm 850 Professional IC Cation - Gradient - Manual (Page 49)

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3 Installation
850 Professional IC Cation – HP-Gradient
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3.14 Injection valve
The injection valve connects the eluent and sample path. Through rapid
and precise valve switchover a precise amount of sample solution defined
by the size of the sample loop is injected and rinsed with eluent onto the
separation column.
3.14.1 Connecting the injection valve
The injection valve has six connectors: two for the sample path (connec-
tors 1 and 2), two for the eluent path (connectors 4 and 5) and two for
the sample loop (connectors 3 and 6).
Note
The capillaries of the eluent path and the sample path and the sample
loop are already installed in the newly delivered instrument.
1 2
3
4 5
6
1
2
3
4
5
6
7
7
7
7
Figure 23 Injection valve – connected
1 Injection valve 2 Sample loop
Connected to connectors 3 and 6.
3 Connection capillary
Connected to connector 4. Carries eluent to
the injection valve. 4 Connection capillary (column inlet
capillary)
Connected to connector 5. Carries eluent to
the separation column.
5 Connection capillary
Connected to connector 1. Carries sample to
the injection valve. 6 Connection capillary
Connected to connector 2. Carries sample to
the waste container.
7 PEEK pressure screw 6.2744.010