Page 222 - Shimadu Consumables Catalog

Septums

Injection Port Septum

Description P/N Color Description
Standard type (20 pcs)

• General-purpose septum
201-35584 White
• Maximum temperature (INJ setting temperature): 250 °C

LL Septum Provides significant durability improvements compared to a
(long life type, 20 pcs) conventional low-bleed septum, offering both low bleed and long
life.
The problem of sticking to the vaporizing chamber during
221-48972-91 Blue
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 Using this septum alleviates the problem of reduced durability
(high temp type, 20 pcs) 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.
221-48398-91 Brown 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
(25 pcs) This septum is least influenced by a plasticizer. Better prevents
septum coring &
221-76650-01 Green
• Low-bleed, suitable for high-sensitivity analysis
• Maximum temperature (INJ setting temperature): 340°C

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

Premium Green Septa (50 pcs)
• Low bleed, highly robust (max. usable temp. 350°C)
• High durability, proper sealing and good resistance to most
chemical solvents.
227-35004-01 Light green
• Useful for trace analysis and other applications where high
sensitivity is critical
Perforated septum for HS-10
• For HS-10 only
221-76863-96 White • To ensure cleanliness and inertness
• Maximum temperature (INJ setting temperature): 250 °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.

Pg C-72