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Click HERE for Frequently Asked Questions about Headspace Vials & Caps.

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Headspace Caps and Septa for GC, GC-MS and Volatile Compound Analysis

MICROSOLV offers a comprehensive selection of headspace caps and septa designed for reliable sealing, pressure retention, and autosampler compatibility in headspace GC and GC-MS applications. Available in crimp-top, screw-top, magnetic, pressure-relief, and SPME-compatible configurations, these closures help ensure reproducible analytical results while supporting a wide range of headspace methods.

Headspace caps and septa are commonly used in pharmaceutical, environmental, forensic, food and beverage, flavor and fragrance, and industrial analysis where sample integrity during heating and pressurization is critical.

Choose the Right Headspace Cap and Septa

Selecting the optimal cap and septa combination depends on:

  • Autosampler manufacturer and model

  • Headspace pressure requirements

  • Sample matrix and solvent compatibility

  • Temperature conditions

  • SPME requirements

  • Septa puncture frequency

  • Crimp-top or screw-top vial selection

Modern screw-top headspace systems provide sealing performance comparable to traditional crimp-top systems while offering simplified sample handling and improved workflow efficiency.

Available Cap Styles

MICROSOLV headspace closures include:

  • Aluminum crimp caps

  • Steel screw caps

  • Magnetic caps

  • Pressure-relief caps

  • Open-hole caps

  • SPME-compatible caps

  • Standard headspace caps

  • Screw-thread headspace caps

Wide Selection of Septa Materials

A broad range of septa materials is available to support different analytical requirements, including:

  • Silicone/PTFE septa (most popular)

  • Low-bleed silicone/PTFE septa

  • Butyl rubber septa

  • Butyl rubber/PTFE septa

  • Natural rubber septa

  • Molded rubber septa

  • Pre-slit septa

  • SPME septa

  • Aluminum foil septa

  • Black, blue, grey, dark grey, orange, red, and translucent rubber septa

Designed for Headspace Instrument Compatibility

Headspace caps and septa are available for a variety of autosampler platforms and method requirements, helping laboratories achieve:

  • Consistent sealing performance

  • Reliable autosampler operation

  • Improved reproducibility

  • Reduced sample loss

  • Extended septa life

  • Reliable pressure retention

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