Zero Air / Dry Air
Zero air a tasteless, colorless, odorless, and, to an extent non flammable gas. However, it might help in burning as it has high content of oxygen. It is prepared by mixing pure oxygen with pure nitrogen, thereby eliminating all impurities found in atmospheric air by filtering it to less than 0.1 parts per million (PPP) of total hydrocarbons.
Zero Air is used:
- In Gas chromatography as it is used as a flame support for Flame Ionization Detectors (FID) and Flame Photometric Detectors (FPD)
- In laboratory applications which are adversely impacted due to the presence of hydrocarbons, or even small levels of Sulphur or nitrous oxide that may be present in the atmospheric air.