Dionex As - Simultaneous Injections

AS Autosampler Operator’s Manual
78 Doc. 065051-03 1/08
3.6.9 Simultaneous Injections
The AS must be in simultaneous mode to perform a simultaneous
injection (see Section 3.6.2
). In simultaneous mode, the AS delivers equal
volumes of sample to two injection valves (see Figure 3-23
). Each
injection is a full-loop size.
Figure 3-23. Simultaneous Injection Sequence
1. Draw air 3. Draw air again to
isolate the sample
KEY
Eluent
Sample
Pump
Column
5. Inject sample simultaneously
onto both system’s columns.
Empty sample syringe (remaining
sample + air bubble
)
Pump
Column
Waste
Flush
Air
2. Draw sample
(inject volume)
4. Deliver 1/2 of sample
to the loop of each inject valve
Pump
Column
LOAD
Inject Valve #1
LOAD
Inject Valve #2
Pump
Column
INJECT
Inject Valve #1
INJECT
Inject Valve #2
Waste
Waste Waste
Sample
Syringe
L
P
C
L
S
W
L
P
C
L
S
W
L
P
C
L
S
W
L
P
C
L
S
W
Sample
Air
Flush