Guidelines for Selecting GC Headspace Vial: 18mm Screw Headspace Vial

Headspace vial are a laboratory container specifically designed to hold headspace analysis samples. This technology involves heating the sample to form a gas phase above the liquid, allowing for the analysis of volatile compounds without direct contact with the liquid sample. The design of these vials ensures that they can withstand high temperatures and pressures, making them suitable for various analytical applications.

The 18mm Screw headspace vial is a specially designed glass container that can be used to analyze volatile compounds in samples. Thread design ensures a secure seal and minimizes the risk of volatile component contamination or evaporation during storage and analysis.

Want to know full infor about Headspace Vial, please check this article: Comprehensive Guide to Headspace vials:Features, Selection, Price, and Usage

18mm Screw Headspace Vial

The headspace vial with a diameter of 22.5 is currently the most commonly used gas phase injection vial specification on the market, while the Screw round bottom headspace vial can be said to be an upgraded version of the clamp type, which can ensure the original function of the clamp headspace vial while achieving the purpose of repeated use. These vials usually have two standard capacities: 10 mL and 20 mL, suitable for various sample sizes. The sample vial can withstand pressures up to 700kPa.

18mm Screw headspace vials are commonly manufactured using high-quality imported 5.0 borosilicate hydrochloric acid glass tubes. At the same time, the design of the vial bottom with a round bottom allows it to have both flat bottom placement function and certain compatibility with automatic sampling equipment. The design of the round bottom of the vial ensures that when the sample vial is placed in the sample tray, it will not stop the sampler due to collision alarms caused by card slots.

This sample vial comes with a 1.3mm soft gasket that can be used as an SPME sample vial.

Cap and Septa of 18mm Headspace Vial

Size parameters:

18mm screw vial cap opening diameter 8mm; Cap is suitable for a diameter of 18mm; 

The diameter of the septa is 17.5mm and the thickness is 1.3-1.5mm.

Characteristic:

Septa: silicone has strong repeated sealing performance, and can maintain good sealing performance even after multiple injections; Polytetrafluoroethylene is currently the most chemically inert material, capable of withstanding strong acids and alkalis. By combining the two materials, the vial can be used for various laboratory applications such as sealed sampling and chemical storage.

The temperature resistance of silicone PTFE combination is -40 ℃ to 200 ℃, which is more suitable for harsh gas phase detection compared to ordinary natural rubber; Butyl spacer is suitable for low-pressure analysis.

The cap is made of special metal steel, which can withstand high temperatures and can be magnetically adsorbed, making it particularly suitable for automatic processing platforms. The surface electroplating is corrosion-resistant and rust free.

Do you want to know more about GC Headspace Vials, please check this article: The Role of Septa in GC Headspace Vials

5 FAQs of 18mm Screw headspace vial

1. How to ensure compatibility with the automatic sampler?

The Screw headspace vial is compatible with commonly used automatic samplers in the market. The gasket can be selected with a thickness of 1.3-1.5mm and is compatible with injection needles for multiple injection treatments. The design of the round bottom of the vial ensures that when the sample vial is placed in the sample tray, it will not stop the sampler due to collision alarms caused by card slots.

2. What are the advantages of a 18mm Screw headspace vial cap?

The Screw vial cap is made of magnetic adsorption material that can be absorbed by an automatic robotic arm, and it also indicates that electroplating treatment can ensure that it will not rust after use.

3. What is the minimum order quantity?

The minimum order quantity for Vial and Clouse is 1 pack (100 pieces). We offer free samples.

4. What services are provided?

Aijiren provides customized logo, customized packaging and other services.

5. Are there any specific storage requirements for these vials?

While 18mm thread headspace vials do not have stringent storage requirements, it is advisable to keep them in a cool, dry place away from direct sunlight to maintain sample integrity and prolong shelf life.


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