Hitachi CHROMASTER 5160 Instruction Manual page 812

Syringe valve
4
va/2
Plunger
wash
Syringe
Wash
fluid1
(3)
Buffer tube
3 2
1
5
Wash
pump
P
3-way solenoid valve
Degassing
unit
Wash
fluid2
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 volume + Injection
volume + Lead volume] after the needle has moved into the
sample vial.
Injection valve
5
Loop
6
Waste
1
solution
From Pump
To Column
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.)
2 - 16
vr + vi + vl
Injection port
4
3
Waste
2
solution
Wash port
va/2
Needle
Rack
Sample