145
12 Injection Port
12.3
12.
GC-2014
12.3Direct Injection System
Q Direct injection system
In a direct injection system, a wide-bore (0.53 mm or greater) column is used. Nearly the
entire amount of sample injected is inrtoduced on the column. This usually results in better
sensitivity than narrow-bore columns with split injections. However, peak shapes are broad,
which decreases resolution and can lead to a higher S/N ratio.
The direct injection system uses a WBI (wide-bore injection) injection port. When WBI is
specified, DIRECT injection mode is automatically used and split mode is not available on
the [INJ] key main screen.
Fig. 12.3.1
Control
Control
TFC
CARRIER
PURGE
PURGE VENT
Capillary column
To Next Page
Loading...
