gc septa three layer

Three Layer GC Septa

Three Layer Septa is made of preconditioned silicone rubber and is 3.81 mm (0.150 in) thick. The average life of these rubber septa is up to 100 injections with a 26s gauge needle. The maximum operating temperature is 200° C.
high temperature gc septum

High Temperature GC Septa

High Temperature Septa is made of preconditioned PTFE/silicone rubber and is 3.175 mm (0.125 in) thick. The average life of these septa is up to 100 injections with a 26s gauge needle. The maximum operating temperature is 212° C.
long life gas chromatography septa

Long Life GC Septa

Long Life GC Autosampler Septa are designed for use with GC Autosamplers. The 5, 9, 11 and 11.5 mm diameter Long Life septa are available with a unique pre-pierced center depression to guide the syringe needle to the same injection point, extending septa life, reducing needle bending and eliminates the common type of coring that occurs on the first injection.
low bleed gas chromatography septum

Low Bleed High Temperature GC Septa

Low Bleed High Temperature Septa are designed for the lowest bleed possible at temperatures up to 400 °C. They can be used in combination with Mass Spectrometers or in applications where septa bleed interferes with trace analysis.

What is the Function of a Septum in Gas Chromatography?

The primary function of a septum is to create a leak-free seal between the atmosphere and carrier gas. Inlet septa are used to seal injection ports in gas chromatography systems to help ensure the efficiency of sample transfer. Septa are designed to withstand high temperatures and repeated punctures without coring or leaking, known as septum bleed. GC Septa can be made of either soft or hard materials, including silicone rubber or PTFE.

Hamilton's gas chromatography septa caps are employed in diverse industries and sectors such as environmental, oil & gas, forensics, and fragrances. Learn more about their unique applications by visiting our HPLC applications page.

Additional Resources for the GC Septa

See all Hamilton Laboratory Products


Hamilton's knowledge base provides a range of explanatory articles, frequently asked questions, and document downloads.
Syringe Custom Built

Work with R&D engineers to customize Hamilton parts

Hamilton's "Custom Built" program puts you directly in contact with a Hamilton R&D Engineer to discuss your application and product needs. The engineer will point you to a standard solution or propose a customized solution to meet your needs.

Talk to an engineer