Gc/Hplc Vial Septa Selection Guide

Gc/Hplc Vial Septa Selection Guide

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Optimise performance and results by choosing the right septum for your application:

PTFE Septa

  • Exceptional solvent resistance
  • Only suitable for single injection use – not recommended for sample storage before or after injection
  • Not resealable
  • The most economical septa
  • Maximum service temperature 260°C

PTFE/Silicone Septa

  • Excellent resealing capabilities – highly recommended for multiple injections and sample storage
  • Autoclavable and excellent resistance to coring
  • PTFE chemical resistance until pierced then the septa will have the compatibility of silicone
  • Temperature range -40°C to 200°C

Pre-slit PTFE/Silicone Septa

  • Reduces the possibility of coring with blunt tipped needles or for applications using a thin gauge needle
  • Used to prevent vacuum from forming inside the vial
  • Temperature range -40°C to 200°C

PTFE/Silicone/PTFE Septa

  • Recommended for multiple injections due to above average resealing capabilities
  • Autoclavable and excellent resistance to coring
  • Recommended for demanding applications such as internal standards, trace analysis or applications where there will be a long time between injections
  • Temperature range -40°C to 200°C

PTFE/Red Rubber Septa

  • The most economical septa used in routine analysis
  • Easy to pierce with moderate resealability
  • PTFE chemical resistance until pierced then the septa will have the compatibility of rubber
  • Not recommended when retaining samples for further analysis or for multiple injections
  • Temperature range -40°C to 110°C

Moulded Polypropylene Septa

  • Only suitable for single injection use – not recommended for sample storage before or after injection
  • Not resealable
  • Temperature range 0°C to 130°C

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