Shimadzu GC-2014 Instruction Manual

12 Injection Port
12.2
12.
126
GC-2014
12.2Split/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

Shimadzu GC-2014 Specifications

General

Type	Gas Chromatograph
Display	LCD
Maximum Heating Rate	120°C/min
Data Acquisition	Digital
Maximum Number of Detectors	4
Weight	Approx. 45 kg
Carrier Gas	Helium, Nitrogen, Hydrogen
Detector Options	FID, TCD, ECD, FPD
Injection Port	Split/Splitless, On-column
Gas Control	Electronic Flow Control (EFC)
Temperature Programming Rate	0.1 to 120 °C/min
Power Requirements	230 V AC, 50/60 Hz
Detector Temperature Range	Up to 400°C (depending on detector type)