Agilent InfinityLab LC Series Vialsamplers User Manual 19
1Introduction
Operating Principle
12 The gripper arm replaces the vial, and returns to the home position.
Simultaneously, the needle lowers into the seat.
13 The injection valve switches to the mainpass (main path) position.
Injection Sequence
Before the start of the injection sequence, and during an analysis, the injection
valve is in the mainpass (main path) position (see
Figure 4 on page 19). In this
position, the mobile phase flows through the autosamplers metering device,
sample loop, and needle. This ensures that all parts in contact with sample are
flushed during the run, thus minimizing carryover.
Figure 4 Mainpass (main path) Position - standard position during runs and when the sampler
is
idle
Vial
Wash
port
Needle
seat
Sampling loop
Solvent
Wash
pump
Metering
device
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