Shimadzu GC-2014 Operation Manual

4.7 Graphite ferrule
94
4.7 Graphite ferrule
 If you are using packed column

Purpose of inspection
(1) Checking for carrier gas leaks
If carrier gas leaks due to graphite deterioration, it causes poor reproducibility.
Check to see if graphite has deteriorated or not. If it has, replace with a new graphite ferrule.
(2) Checking if graphite impurity is the cause of ghost peaks
Generally speaking, if ghost peaks appear in your analysis, there can be impurities in the column inlet
connection.
If your baseline drift is quite large even though using a sufficiently aged column, there can be impurities
in the column outlet connection.
In such cases, condition graphite ferrule by the following procedures.
 Conditioning graphite ferrule
If the graphite impurity is the cause of ghost peaks, condition graphite ferrule by this procedure. (Perform
this just before you start analyzing. If you leave graphite ferrule for a while after conditioning, it can absorb
impurities again.)
Use gas burner. Put graphite ferrule into the blue flame, and heat it for 1 to 2 sec. after graphite turns red.
Indicates deterioration (no gap)
New graphite ferrule Graphite ferrule to be replaced
CAUTION
Hold graphite ferrule in such a way as to avoid burns.
Graphite ferrule

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)