Shimadzu GC-2014 Instruction Manual

3 Installing Packed Columns and Setting Analytical Flow Lines
3.4 Packed TCD Analysis
41
GC-2014
3. Set the TCD.
(1) Press the [DET] key.
(2) Set “Signal polarity” as described below.
: The TCD (L) - TCD (R) signal is outputted.
(When a sample, which a plus peak is detected, is injected into the dual INJ (L))
: The TCD (R) - TCD (L) signal is outputted.
(When a sample, which a plus peak is detected, is injected into the dual INJ (R))
TCD signals do not necessarily have a plus peak because they are determined by relationship of heat
conduction between a substance to be analyzed and carrier gas. However, the data processing unit
normally calculates the area of a plus peak. When a minus peak is detected, “signal polarity” needs to
be inverted into a plus peak. In this case, inject a sample into the opposite inlet of the one instructed on
the popup screen shown below.
“Signal polarity” can be changed using the time program during analysis. (For detailed descriptions
about setting the time program, refer to
“16.3 Time Program”)
+
-
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)