Shimadzu GC-2014 Instruction Manual

13 Detector
13.1 Hydrogen Flame Ionization Detector (FID)
157
GC-2014
13.1.3 Setting the Detector Gas (manual flow controller)
Hydrogen and air are supplied to the FID as detector gas. For capillary analysis, makeup
gas is required to prevent peak tailing and optimize FID sensitivity.
GC-2014 has flow controllers according to models as described below.
Set the detector gas flow rate following the procedures described below.
1. Turn the main valve of the gas cylinder to supply gas to the GC.
2. Open the flow controller cover on the top of the back of the unit.
Layouts for the models with the dual FID and models with the single FID are as shown
in Fig. 13.1.3 (a) and Fig. 13.1.3 (b) respectively.
3. When the optional solenoid valve to shut off supply gas (P/N 221-70782-91) is installed,
hydrogen and air are shut off by the valve until ignition. To adjust the pressure, press the
[VLV On] key on the [DET] key main screen to open the solenoid valve.
4. Turn the pressure regulators to set the pressure as described below.
Hydrogen 55 kPa (Approx. 40 ml/min)
Air 40 kPa (Approx. 400 ml/min)
Makeup gas (nitrogen) 75 kPa (Approx. 30 ml/min)
Makeup gas (helium) 80 kPa (Approx. 30 ml/min)
Pressure-flow rate calibration curves for each flow controller are shown in Fig. 13.1.4. These curves
slightly differ according to units.
Models with the dual FID (GC-2014AF, GC2014ATF, etc.)
Two flow paths of manual flow controllers with hydrogen and air
Models with the single FID (GC-2014AFsc, etc.)
One flow path of manual flow controller with hydrogen and air
One flow path of manual flow controller for makeup gas
(a) Dual FID (b) Single FID
Fig. 13.1.3 Manual flow controller for FID
Top
Bottom
Hydrogen
pressure mete
r
Right
Flow controller
for the right side FID
Left
Flow controller
for the left side FID
Back
Hydrogen
pressure regulator
Front
Air pressure regulator
Air
pressure mete
r
Top
Bottom
Hydrogen
pressure mete
r
Back
Hydrogen
pressure regulator
Front
Air pressure regulator
Air
pressure mete
r
Top
Makeup gas
pressure meter
Back
Makeup gas
pressure regulator
NOTE

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)