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Zhejiang Aijiren, Inc.
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  5. Aijiren - 9mm Short Thread Caps with ...

Aijiren - 9mm Short Thread Caps with Septa

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Caps for screw thread vials are available with either an open hole for autosampler use and standard addition or with a solid top for sample storage. One piece polypropylene cap and membrane are also available. These pierceable screw thread caps are designed for one time use and reduce sample preparation time as there is no cap and seal to assemble. Screw Cap Vials are universal. Screwing the cap applies a mechanical force that squeezes the septum between the glass rim and the cap. Screw caps form an excellent seal and mechanically hold the septum in place during piercing. No tools are required for assembly.

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  • Suitable for: 9mm Short Thread Vials
  • Caps Material: polypropylene
  • Septa Material: PTFE / Silicone
  • Septa Size: 9*1mm
  • Cap Features: 6mm Centre Hole or Closed Top
  • Color: Blue, Black, Red, Yellow or Customized

Caps

The Screw Caps that are inlcuded with this kit are knurled on the sides for excellent gripping and comfort when applyting to the vial.

Due to their artificially reduced cap height screw caps N9 don`t have a standardized thread design. Therefore, it is recommendable only to use vials and closures from one source of supply, in order to ensure a harmonious and tight matching of both components.

Septa

PTFE/Silicone Septa:

High quality, pure silicone is laminated to PTFE to give a pure, highly inert septum with excellent resealing characteristics even after repeated punctures.

PTFE/Silicone septa are the preferred product for use in most HPLC and GC applications where resealability and high purity are critical. Works well for applications where ease of needle penetration is important.

Septa-silica gel has strong repetitive sealability, and it can maintain good close performance after multiple injections; PTFE is a material with better chemical conditions at present, and it can withstand strong acids and alkalis. The two materials After compounding, the bottle can be used for various laboratory purposes such as sealed sampling, chemical storage and so on. 

PTFE/Silicone/PTFE Septa:

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

  1. PTFE/Silicone septa are most popular for HPLC applications, and Pre-slit septa are easier to pierce with needles.
  2. Usually, the cap color is clear or blue, other special colors can be also produced Accordingly.
  3. Easy to apply and easy to remove.
  4. Pre-assembled caps and septa are convenient.