Agilent InfinityLab LC Series Vialsamplers User Manual 22
1Introduction
Operating Principle
When the metering unit has drawn the required volume of sample into the
sample loop, the vial is replaced in the sample tray. The wash port flips into the
origin position, the needle is lowered into the needle seat, and the injection valve
switches back to mainpass (main path) position, flushing the sample onto the
column (see
Figure 7 on page 22).
Figure 7 Valve switches to mainpass (main path) - sample is transferred towards the LC column
Vial
Wash
port
Needle
seat
Sampling loop
Solvent
Wash
pump
Metering
device
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