10mL & 20mL screw neck ND18 rounded bottom headspace vials with matched 18mm magnetic precision screw metal caps, 17.5mm PTFE/silicone septa. Aijiren Tech screw headspace vials are manufactured to provide uniform glass thickness which insures even heat distribution for consistent sampling reliability. All Aijiren Tech headspace vials meet or exceed the OEM instrument manufacturer’s specifications. Aijiren Tech screw GC vials are available in 10ml, 20ml versions. Headspace vials are a kind of laboratory vials for top space analysis, with the features of high-temperature resistance and corrosion resistance. A headspace vial is used in the process of top–gas chromatography. When detecting volatile or semi-volatile mixtures with high boiling points, we need to heat them to vaporize them at the top. In this process, since the liquid samples are at the bottom, the material in the top gas can be measured without touching the liquid in the sample vial.
