Inlet Septa Information

What is the Function
The septum isolates the sample flow path from the outside world. It must provide a barrier that is readily penetrated by the injector needle while maintaining internal pressure without contaminating the analysis. Septa are generally made of special high temperature, low-bleed silicone rubber formulations.

Why Replace
Septa should be replaced regularly to avoid:

• leaks
• decomposition
• sample loss
• reduced column or split vent flow
• ghost peaks
• column degradation

How to Minimize Problems
Avoid problems by:

• using Premium Non-Stick Septa to avoid sticking and contamination
• using with the recommended temperature range
• changing regularly
• installing the retainer nut "hand tight"
• using septum purge when available
• using autoinjectors
• using sharp syringe needles

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