18mm screw headspace cap

Suitable for: 18mm screw top headspace vials
Cap material: magnetic metal
Cap features: 8mm center hole
Color: Metallic Silver
Septa material: PTFE / silicone
Septa size: 17.5*1.5mm
Package: 100pcs/pack

The metal cover provides the widest temperature tolerance range and is very resistant to impact cracking. The metal cover is very suitable for gas chromatography applications. The metal cover is made of steel (chrome-plated or tinplate anti-corrosion coating) or aluminum.

The material of the headspace sample bottle produced by Aijiren is borosilicate glass with low extraction rate, which has low expansion rate, high temperature resistance, high strength, high hardness, high light transmittance and high chemical stability. The headspace sample bottle is suitable for headspace analysis of volatile solids and gases.

Aijiren’s 20ml Headspace Vial has a specification of 22.5*75mm. It has two colors, clear and amber. The glass type of precision screw headspace vial is 5.0 type, but 20ml clear precision screw headspace vial has a type with or without label area.

The 18mm screw thread 10ml gc vial produced by Aijiren has a specification of 22.5*46mm, and the glass is borosilicate glass, all of which are 5.0 type. The round bottom design prevents reagents from remaining on the bottom of the 18mm screw thread 10ml gc vial. Amber glass can protect samples sensitive to light.

The 20ml headspace vial is very popular in gas chromatography because of its large capacity, because it allows the vaporized gas in the sample to float on the upper layer and completely separate from the liquid, which is convenient for the autosampler to extract the gas to be detected. The Screw Cap has a center hole to ensure the convenience of the automatic injection needle in and out.

With the use of headspace vials, the whole experiment can be prepared for analysis in an efficient and accurate way. The essence of this experiment is that the volatile sample is heated and vaporized to form a gas in the top space of the headspace vial and then diffuses. Finally, the gas in the vial enters the gas phase detection.

Aijiren headspace vials are available in clear or amber glass with a round or flat base, a crimp seal with a beveled or square edge finish, or with a screw-thread finish. Headspace vials, septum, and caps can be purchased in various quantities separately or together as convenience kits to fit your laboratory needs.