Injection Valve - Metrohm 930 Compact IC Flex ChS Manual

3.9 Injection valve

3.9 Injection valve
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26
The pulsation absorber is completely connected. No installation work is
required.
The injection valve connects the eluent path to the sample path. By a
quick and precise switching of the valve a defined quantity of sample solu-
tion is injected and flushed to the separation column with the eluent.
The quantity of sample solution injected is determined by:
the volume of the sample loop or
￭
by an 800 Dosino when the Metrohm intelligent Partial Loop Injection
￭
Technique (MiPT) is used.
The choice of sample loop depends on the application. The following
sample loops are normally used:
Table 1 Which sample loop do I need?
Application
Cation determination
Anion determination with suppression
Anion determination without suppression
MiPT
The injection valve is completely connected. No installation work is
required.
Optional: Exchanging the sample loop
The sample loop can be replaced to match the application (see Table 1,
page 26).
NOTE
Only use PEEK pressure screws (6.2744.010) to connect capillaries and
the sample loop to the injection valve.
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Sample loop
100 µL
250 µL
930 Compact IC Flex ChS (2.930.1200)
20 µL
20 µL