8-425 Open Top Screw Closures Pre-Slit


8-425 Open Top Screw Closures with Pre-Slit Septa are specialized caps designed for secure sealing of chromatography vials, facilitating efficient sample access during analytical procedures.

Key Features:

  • Thread Size: 8-425, ensuring compatibility with standard 2 mL autosampler vials.

  • Material: Typically constructed from chemically resistant polypropylene (PP) or phenolic resin, offering durability and compatibility with various solvents.

  • Septa Composition: Equipped with pre-slit septa, commonly made from PTFE (Polytetrafluoroethylene) and silicone layers. The PTFE provides a chemically inert barrier, while the silicone offers resealability after needle penetration.

  • Pre-Slit Design: The pre-slit in the septa allows for easier needle insertion and minimizes coring, enhancing the longevity of the septa and ensuring consistent sample integrity.

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 Description

This closures are specially designed for the 2ml 8-425 autosampler vial and has a built-in PTFE/SILICONE septat. It is an ideal choice for precise laboratory analysis. Made of high-quality materials, it has excellent chemical stability and excellent sealing properties, effectively preventing sample contamination and volatilization, and ensuring the accuracy of experimental results. It is suitable for widespread use in high-performance liquid chromatography (HPLC), gas chromatography (GC) and other analytical tests, and meets the laboratory’s high standard requirements for sample processing. Easy to operate and highly adaptable, it provides great convenience and reliability guarantee for scientific research and quality inspection work.

 

 Application

HPLC and GC Autosampler Analysis
Open top caps are used where high-throughput sample analysis via an autosampler is required. This design allows the sampler needle of the autosampler to pass directly through the opening in the cap to extract the sample in the bottle without manually opening the vial cap, improving the efficiency and accuracy of analysis. For laboratories that conduct a large number of sample tests, the use of open top caps with automatic samplers can significantly improve the speed and repeatability of sample processing and reduce human errors during operation.

 

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