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11-425 Snap Cap Preassembled PTFE / Silicone Snap Open Cap with Hole Microlab Scentific

11mm Snap caps provide a secure seal, minimizing evaporation even with volatile samples, the audible click ensures that a secure seal has been formed and the cap is properly applied. Snap caps have septa pre-assembled, Snap caps are compatible with Aijiren Vials and other snap-ring style vials.

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Caps and Septa

11mm Snap caps provide a secure seal, minimizing evaporation even with volatile samples, the audible click ensures that a secure seal has been formed and the cap is properly applied. Snap caps have septa pre-assembled, Snap caps are compatible with Aijiren Vials and other snap-ring style vialsm.
Snap ring closures N11 should only be used in HPLC, as the punctual compacting pressure of the septum against the vial rim by the four pins in the cap does not achieve the same level of tightness as the evenly applied pressure through a screw thread or by crimping.

Pre-slit or Not

  1. Chromatography septas can be pre-slit or not and must be considered by evaluating a few factors. A pre-slit septum is an ideal choice in applications requiring 20% or more of the sample injection each time from the vial so that suction is avoided.
  2. The slit allows ambient gas to equalize the gas in the vial so that a vacuum is not created in the vial from the tight seal around the needle. If coring or clogging from a narrow needle or needle deflection from highly durable septa material is a concern, then choosing a pre-slit septum is a better choice.
  3. The non-pre-slit septas help to reduce carryover from vial to vial because the resealing characteristics of the septum act as a squeegee to wipe solution from the outside of the needle. Typically, a non-slit septum exhibits resealing capabilities for a limited number of needle punctures but for long-term storage in the vial, using a new non-punctured septum is best practice.

Caps are made of high quality polypropylene, Caps have the profile of snap closure for compatibility with robotic autosamplers, Pre-assembled septa reduces the chance of contamination during sample preparation, while saving sample preparation time in the lab.
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