Hydrocarbon removal air usually refers to the removal of hydrocarbon components of the air, its main components include nitrogen, oxygen, carbon dioxide and water vapor.

1. Nitrogen (N2): the most important component of air, accounting for about 78% of the total volume of air, composed of nitrogen atoms of colorless, tasteless gas, for the human body and most organisms have no direct physiological effect.

2. Oxygen (O2): the second main component in the air, accounting for about 21% of the total volume of air, to maintain the normal breathing and combustion of organisms important gas, the human body needs oxygen for energy supply in the metabolic process.

3. Carbon dioxide (CO2): an important component of the air, the content of about 0.04%, plants and animals in the process of photosynthesis absorption of gas, is also a kind of greenhouse gas in the earth's atmosphere.

4. Water vapor (H2O): The gaseous form of water present in the air. It is a solute in the air, and its content changes with temperature and humidity.

In specific standards or applications, hydrocarbon free air refers to air with a very low total hydrocarbon content. For example, some standards specify that the total hydrocarbon content (oxygen peak) in hydrocarbon free air should be ≤0.40 mg/m3(in methane); Or when measured on a methane column, no peaks other than the oxygen peak should appear. Such hydrocarbon removing air is commonly used in laboratory analytical tests to ensure the accuracy of test results. In order to obtain high quality hydrocarbon removing air, it may be necessary to remove hydrocarbon components from the air through specific preparation methods, which usually involve the use of adsorbents, catalysts or freezing techniques. In environmental monitoring, scientific research and industrial processes, the use of hydrocarbon removing air can ensure the accuracy and reliability of experimental or measurement results.