Inlet Septa

Injection Port Septum

 

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.

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
Details 
(10 pcs)
221-35507-01SP Green High temperature Thermogreen Septa, green colored Maximum injector temperature 450°C
Details
(50 pcs)
221-35507-02SP Green High temperature Thermogreen Septa, green colored Maximum injector temperature 450°C

 

 

Further dimensions and specifications on request. For Research Use Only. Not for use in diagnostic procedures. This page may contain references to products that are not available in your country. Please contact us to check the availability of these products in your country.