Headspace Vials, Screw Top

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Model Number: NH-30573

Brand: Niche Healthcare

Screw Headspace caps, septa, and vials are designed especially for use with Agilent and CTC rotating or robotic arm samplers.
10ml,20ml clear or Amber precision thread vial.


Headspace vials with screw tops are specialized vials designed for the collection and analysis of gas samples in gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) applications. Headspace sampling involves extracting volatile compounds that are present in the gas phase above a liquid sample in a sealed vial. This technique is particularly useful for the analysis of volatile and semi-volatile compounds in liquid samples without directly injecting the liquid into the chromatograph.

Here are some key features and aspects of headspace vials with screw tops:

Design: Headspace vials typically have a cylindrical shape and are made of glass or other inert materials to prevent interference with the sample being analysed.

Screw Top: The vials are equipped with a screw-threaded top or cap, allowing for a secure and airtight seal. The screw top design facilitates easy and secure closure of the vial, maintaining the integrity of the gas phase above the liquid sample.

Septa or Cap Liner: The screw top usually contains a septa or cap liner made of materials such as silicone or PTFE (polytetrafluoroethylene). The septa provides a seal that allows for the penetration of a syringe needle during sample injection.

Headspace Sampling: The headspace vial is used for collecting the gas phase above a liquid sample. After sealing the vial, it is heated to allow volatile compounds to move from the liquid phase into the headspace. A syringe is then used to withdraw a portion of the headspace for injection into the gas chromatograph.

Sizes and Capacities: Headspace vials come in various sizes and capacities to accommodate different sample volumes and analytical requirements.

Application: Headspace sampling is widely used in pharmaceutical, environmental, food, and forensic analysis, among other fields. It is particularly valuable for the analysis of volatile organic compounds (VOCs) in liquid samples.

Compatibility: Headspace vials are compatible with various analytical instruments, including GC and GC-MS systems. They are often used in combination with autosamplers for high-throughput sample analysis.

It’s important to note that the choice of headspace vials, septa, and caps depends on the specific requirements of the analytical method and the nature of the sample being analysed. The secure sealing and inert materials used in the vials help ensure accurate and reproducible results in gas chromatography applications.



Laboratory Medical Equipment

Laboratory Medical Equipment.


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