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12 Injection Port
12.2
12
.
126
GC-2014
12.2
Split/Splitless Injection System
Q
Split injection system
In a split injection system, only a portion of the sample injected into the injection port is
introduced into the capillary column. The remaining sample is sent to the split line due to
high sample volume or concentration.
Fig. 12.2.1
Q
Splitless injection system
The splitless injection system is used to analyze samples of low concentration.
In a splitless injection system, the split vent is closed and the initial temperature of the column
oven is low. Then, after injection, and once the vaporized sample has moved to the column,
the split vent is open and the column temperature increased so that the condensed sample
inside the column is vaporized again and separated.
Fig. 12.2.2
Control
TFC
CARRIER
PURGE
PURGE VENT
SPLIT VENT
Control
Control
ESC
SPLIT
Capillary column
Control
TFC
CARRIER
PURGE
PURGE VENT
SPLIT VENT
Close
SPLIT
Capillary column
(a) During sampling time
Control
Control
TFC
CARRIER
PURGE
PURGE VENT
SPLIT VENT
Control
ESC
SPLIT
Capillary column
(b) After sampling time
Control
Содержание GC-2014
Страница 4: ...This page is intentionally left blank ...
Страница 12: ...Contents viii GC 2014 This page is intentionally left blank ...
Страница 28: ...1 Installation 1 3 Gas Supply Plumbing 16 GC 2014 This page is intentionally left blank ...
Страница 42: ...2 Before Use 2 6 Connecting the Relay Terminals 30 GC 2014 This page is intentionally left blank ...
Страница 78: ...5 Analysis 5 2 Notes for Analysis 66 GC 2014 This page is intentionally left blank ...
Страница 90: ...6 Basic Key Operation 6 4 Getting Help 78 GC 2014 This page is intentionally left blank ...
Страница 130: ...11 Creating an Oven Temperature Program 11 2 Temperature Programs 118 GC 2014 This page is intentionally left blank ...
Страница 164: ...12 Injection Port 12 5 Setting the Flow Rate Parameters 152 GC 2014 This page is intentionally left blank ...
Страница 282: ...16 Special Functions 16 10 ROM Version No 270 GC 2014 This page is intentionally left blank ...
Страница 318: ...306 GC 2014 This page is intentionally left blank ...