GC Columns & Consumables

Injection Port Septum

Injection Port Septum

Description P/N Color Features
Standard type
Standard type
(20 pcs)
201-35584 White General-purpose septum
LL Septum
LL Septum
(long life type, 20 pcs)
221-48972-91 Blue
Provides significant durability improvements compared to a conventional low-bleed septum, offering both low bleed and long life.
The problem of sticking to the vaporizing chamber during continuous use at high temperatures experienced with a conventional septum has also been eliminated.

 • Suitable for high-sensitivity analysis
 • Maximum temperature (INJ setting temperature): 450°C
HT Septum
HT Septum
(high temp type, 20 pcs)
221-48398-91 Brown
Using this septum alleviates the problem of reduced durability when the vaporizing chamber is used continuously at 450°C. Compared to the LL septum, the increase in bleed when used at high temperatures is kept at a lower level. The problem of sticking to the vaporizing chamber during continuous use at high temperatures experienced with a conventional septum has also been eliminated.

 • Suitable for high-sensitivity analysis at high temperatures
 • Maximum temperature (INJ setting temperature): 450°C 
Low-bleed Septum
Low-bleed Septum
(25 pcs)
221-76650-01 Green This septum is least influenced by a plasticizer. Better prevents septum coring.

 • Low-bleed, suitable for high-sensitivity analysis
Enduro Blue Septum
Enduro Blue Septum
(50 pcs)
221-75180 Light blue  • Low-bleed, suitable for high-sensitivity analysis at high temperatures
 • Maximum temperature (INJ setting temperature): 350°C

Low-bleed septum is not completely free of bleeding. The type of bleeding that occurs varies with the septum, and results in different patterns on chromatograms. In the case of high-sensitivity analysis, it is necessary to select a septum whose bleeding will not occur at a point that interferes with the peak of the target compound. Conditioning for several hours between 200°C and 250°C after extraction with hexane may help to reduce bleeding.
In the case of using a syringe for AOC, it is recommended to exchange the septum after about 100 injections. If the outside diameter of a needle of a gastight syringe is thick, it is recommended to exchange after about 50 injections.

For Research Use Only. Not for use in diagnostic procedures.

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