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Caps with PTFE Septa for 10-425 Screw autosampler Vials

Caps are available pre-assembled with separate septa or without septa. We also offer Polypropylene Hole Caps with bonded septa to ensure that the septa will not slip off the cap during injection. PTFE/Silicone/PTFE septa provide superior performance with any autosampler using a large diameter, blunt-tipped needle.

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Caps

These polypropylene caps have excellent sealing properties and offer good chemical resistance, including acids, alcohols, alkalis, aqueous products, cosmetics, and household oils. Polypropylene hole caps are known for good impact resistance, cost effectiveness and flexibility. Septum sold separately. Polypropylene Hole Caps are available pre-assembled with separate septa or without septa. We also offer Polypropylene Hole Caps with bonded septa to ensure that the septa will not slip off the cap during injection.

Septa

PTFE/Silicone Septa:

  1. PTFE/Silicone Septa are the preferred product for use in most HPLC and GC applications where resealability and high purity are critical.
  2. Works well for applications where ease of needle penetration is important.
  3. Septa-silica gel has strong repeatability and can maintain good sealing performance after multiple injections;
  4. PTFE is a material with better chemical conditions at present and can withstand strong acids and alkalis. The two materials After compounding, the vials can be used for various laboratory purposes, such as sealed sampling, chemical storage and so on.

PTFE/Silicone/PTFE Septa:

  1. A layer of PTFE is laminated to each side of high purity, medium durometer silicone to form a septum that is most resistant to coring while maintaining good resealability.
  2. The PTFE/Silicone/PTFE septum is recommended for the most critical applications such as ultra trace analysis or where there is a long time between injections or for internal standard methods.
  3. PTFE/Silicone/PTFE septa provide superior performance with any autosampler using a large diameter, blunt-tipped needle.
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