2ml clear screw vial hole cap with PTFE silicone septum
Streamline your laboratory workflow with our pre-assembled 2mL vial kits. By combining the high-purity glass vial with a pre-screwed cap and septum, we eliminate the risk of contamination caused by manual assembly. The core of this kit is the high-performance vial septum, designed to handle multiple injections without coring.
The PTFE/Silicone Advantage
The choice of septum material dictates the success of your injection. This kit includes a bonded PTFE/Silicone septum, the industry standard for HPLC and GC.
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PTFE Layer (Red/White): The chemically inert barrier that faces the sample. It resists organic solvents, acids, and bases, ensuring the septum does not contaminate your sample.
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Silicone Layer (White/Blue): Provides the mechanical elasticity. It ensures the vial septum reseals instantly after the needle is withdrawn, preventing sample evaporation or external contamination.
Pre-Assembled for Efficiency and Cleanliness
Handling loose septa can transfer skin oils or dust into the vial. Our 9mm screw caps come with the septa already inserted (and optionally bonded). “Bonded” means the septum is fused to the cap, preventing it from pushing into the vial during needle penetration—a common issue with non-bonded caps that can ruin an analysis run.
Kit Specifications
This all-in-one solution is perfect for high-throughput labs.
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Vial: 2mL Clear Borosilicate Glass, 9mm Short Thread.
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Cap: Blue Polypropylene (PP) Open-Top Cap.
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Septum: 1.0mm thick PTFE/Silicone (Pre-slit options available).
Why is the PTFE layer facing the sample? PTFE (Teflon) is chemically inert. It must face the sample to prevent the solvent from attacking the silicone layer, which could lead to “ghost peaks” in your chromatogram.
What is the benefit of a bonded cap and septum? A bonded septum is physically attached to the cap. This prevents the septum from falling out during transport and, more importantly, prevents “push-through” where the needle forces the septum into the vial.
