(3) Sampling
The syringe aspirates one-half of the air volume (:va/2) while
needle is moving to the sample vial.
The syringe aspirates [vr + vi + vl : Rear Injection
Lead volume] after the needle has moved into the
sample vial.
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
vr + vi + vl
Injection port
5
4
3
2
1
6
Waste
solution
Loop
Waste
solution
Wash port
Sample
Rack
Wash
fluid2
Wash
fluid1
P
Needle
va/2
va/2
3-way solenoid valve
Degassing
unit
2 - 16
Summary of Contents for CHROMASTER 5160
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