Septas

The role of septa for GC analysis is key with many chromatographic problems caused as a result of inappropriate septa material or inappropriate handling of the septa.

Desired septa attributes:
  • Must reliably seal against the carrier gas pressure in the inlet.
  • Must be capable of being pierced by the syringe needle without pieces of the septa being deposited in the GC inlet system, which would be catastrophic to the chromatography.
  • Must be capable of being pierced and resealed time after time.
  • Must not be allowed to be contaminated or bleed material into the chromatographic system.
EC Grade
GP Grade
HT Grade
MN Grade

Signet Septa EC Grade

Features and Benefits
  • Combines significantly longer injection life, low bleed and low injection port adhesion.
  • Blister packed to prevent absorption from the environment.

Recommended Applications
High turnover applications.

Product Specifications
Sizes available (mm): 6, 7, 8, 9, 10, 11, 11.5, 12.5, 17, plug.

Signet Septa GP Grade

Features and Benefits
  • Combines significantly longer injection life, low bleed and low injection port adhesion.
  • Blister packed to prevent absorption from the environment.

Recommended Applications
Low temperature.

Product Specifications
Sizes available (mm): 5, 6, 7, 8, 9, 9.5, 10, 11, 11.5, 12.5, 15.

Signet Septa HT Grade

Features and Benefits
  • Bleed and temperature optimized combined with outstanding mechanical properties for the highest temperature applications.
  • Retains softness and pierceability at high temperatures, and low injection port adhesion.
  • Blister packed to prevent absorption from the environment.

Recommended Applications
Highest temperature applications.

Product Specifications
Sizes available (mm): 6, 9, 9.5, 11, 11.5, 12.5, 17, plug.

Signet Septa MN Grade

Features and Benefits
  • Premium septum for autosamplers with up to 400 injections per septum.
  • Comes supplied in a blister pack which prevent absorption from the environment.

Recommended Applications
Premium septa for autosamplers with up to 400 injections per septum.

Product Specifications
Sizes available (mm): 5, 9, 11, 11.5, 12.5, 17