(5) Movement of the needle and discharge of the lead volume
After the needle has moved into the injection port, the
injection valve is switched to inject the sample.
Buffer tube
vd :Dead volume (the instrument inside parameter)
vi :Injection volume (the sample net volume to the flow path)
vl :Lead volume (forward part, cut volume)
vr :Rear volume (rearward part, cut volume)
va :Air volume (the air volume which sample is sandwiched.)
Injection valve
Syringe valve
Syringe
Wash
pump
5
1
3
2
4
Plunger
wash
From Pump
To Column
Injection port
5
4
3
2
1
6
Waste
solution
Loop
Waste
solution
Wash port
Sample
Rack
Wash
fluid2
Wash
fluid1
P
Needle
vl
vl
+ va/2
+ vd
Degassing
unit
3-way solenoid valve
2 - 18
Summary of Contents for CHROMASTER 5160
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