Black 8-425 Open Top Screw Closures


Black 8-425 Open Top Screw Closures are essential components in chromatography and laboratory applications, designed to securely seal vials while allowing easy access for sample introduction.

Key Features:

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

  • Material: Typically made from chemically resistant polypropylene or phenolic resin, ensuring durability and compatibility with various solvents.

  • Design: Open-top caps facilitate easy needle penetration for sample injection.

  • Septa Options: Often paired with PTFE/Silicone septa, available in various thicknesses (e.g., 1.5mm) and configurations (pre-slit or non-slit) to suit specific applications

These closures are widely used in High-Performance Liquid Chromatography (HPLC) and Gas Chromatography (GC) to maintain sample integrity and prevent contamination during analysis.

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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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