Guidelines for Selecting Headspace Vial: 20mm Crimp Headspace Vial

Headspace gas analysis also helps in automated quality control or sample screening. This is done using modern instrumentation, which allows the entire experiment to be analyzed in an efficient and accurate manner through the high reproducibility of samples.

It is important to know that complex sample matrices are not easy to analyze directly unless sample extracts or preparations are used, but this will be very time-consuming and resource-intensive, so it is convenient to choose to use gas phase detection samples. High temperature resistant and highly stable headspace vials should be used during the detection process, which makes the detection values stable and reliable.

20mm Crimp Headspace Vial

Most 20mm crimp headspace vials are made of high-quality borosilicate glass or polypropylene. Borosilicate glass is favored for its chemical resistance and thermal stability, and is ideal for storing volatile compounds. The headspace vial with a diameter of 22.5 is the most common gas phase injection vial specification on the market. It can achieve a good sealing effect after sealing with a special tool. The lid is made of aluminum cap, which is particularly suitable for laboratory use. At the same time, some of the bottoms of the vials are designed with round bottoms, which makes it have a flat bottom placement function and a certain compatibility with automatic injection equipment.

Crimp Headspace Vial Details:

Vial diameter: 20mm

Actual capacity: 10mL-20mL

(10mL height 46mm, 20mL height 75.5mm)

Vial type: round bottom or flat bottom

(flat bottom bottom diameter 22.5mm, round bottom bottom diameter 23mm)

20mm Crimp Headspace Vial Cap and Septa

Cap and Septa Size:

The diameter of the septum is 20mm, the thickness is 3mm; the diameter of the cap opening is 10mm;

The cap is suitable for the 20mm diameter crimp vial mouth, and a special sealing tool is required when using it.

Cap and Septa Features:

Septa: Silicone has strong re-sealability, and can maintain good sealing performance after multiple injections; polytetrafluoroethylene is the best chemically inert material at present, which can withstand strong acids and alkalis. After the two materials are combined, the vial can be used for sealed injection, chemical storage and other laboratory purposes. The temperature resistance of the silicone Teflon combination is -40℃ to 200℃, which is more suitable for harsh gas phase detection conditions than ordinary natural rubber.

Headspace vial cap: The crimp headspace vial can be sealed with a conventional 20MM sealing pliers. The magnetic two-color aluminum cap can be magnetically adsorbed and is particularly suitable for the absorption of the automatic processing platform.

2 Considerations for Crimp Top Headspace Vials

It should be noted that this type of headspace sample vial has certain limitations in the use with the aluminum cap.

The first pressure limit, the general aluminum cap can only withstand a pressure within 500kPa. If it exceeds this range, there may be a risk of the aluminum cap tearing and exploding. It is necessary to use a cap gasket with a pressure relief device or a safety aluminum cap with expansion tearing to ensure the safety of the experiment (suitable for ultra-high boiling point solvents and continuous ultra-high temperature experiments);

The second crimp-type sample vial cannot be used again if the cap is curled after use. The sample vial has also been contaminated by the solvent under heating conditions. Repeated use will cause risks such as contamination and leakage, so please use the sample vial and cap gasket once.

Want to know how to clean headspace chromatography vial? Check this article: How to clean headspace chromatography vial?

Application of Headspace Vials

GC headspace technology is used to analyze the experiment of volatile organic solid and liquid samples after vaporization. In recent years, the popularity of this technology has been recognized by laboratories around the world, especially for the detection and analysis of alcohols, blood, and residual organic solvents in pharmaceutical products.

Other common applications include the detection of gases in polymers and plastics, flavor compounds in beverages and foods, and volatile substances such as perfumes and cosmetics.