Shimadzu GC-2014 Instruction Manual

12 Injection Port
12.2 Split/Splitless Injection System
143
GC-2014
12.2.9 High pressure injection and splitter fix mode
Q High Pressure Injection
High pressure injection is a split/splitless injection method which keeps the column inlet
pressure at a value higher than the analysis pressure for a specified period of time while the
sample is injected. Then, the column inlet pressure returns to the normal analysis value.
High pressure injection is effective especially for the splitless injection system. High
pressure injections, can reduce the total gas volume and improve percent recovery valves.
Q Splitter Fix
If the injected sample consists of a solvent with a high vaporization expansion coefficient,
the pressure inside the injection port drastically increases when the solvent vaporizes. This
can result in too much solvent being diverted from the column, reducing sensitivity.
Sending power to the split flow valve at sample injection can keep the split ratio at its desig-
nated valve.
12.2.9.1 Screen description
Select [Advanced] (PF menu) from the [FLOW] key main screen when not in “DIRECT”
mode to open the advanced screen shown in Fig. 12.2.16.
Fig. 12.2.16 Setup screen for high pressure injection and splitter fix mode

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)