Hitachi CHROMASTER 5160 Instruction Manual page 834

Syringe valve
4
va/2
Plunger
wash
Syringe
Wash
fluid1
(3)
Buffer tube
Injection valve
3 2
1
5
Wash pump
P
3-way solenoid valve
Degassing
unit
vd :Dead volume (the instrument inside parameter)
vi :Injection volume (the sample net volume to the flow path)
vw :Waste volume (the air volume of the lead and rear part of a sample)
va :Air volume (the air volume which sample is sandwiched.)
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 [vw + vi :Waste volume + Injection
volume] after the needle has moved into the sample vial.
5
Loop
6
Waste
1
solution
From Pump To Column
2 - 38
va/2
vw + vi
Injection port
4
3
Waste
2
solution
Wash port
Needle
Rack
Sample