IS 5182-21 is a legally binding document that describes how to measure non-methane hydrocarbons in the air using gas chromatography:

 IS 5182-21 is a legally binding document that describes how to measure non-methane hydrocarbons in the air using gas chromatography: 

Scope

This standard describes how to measure non-methane hydrocarbons in the atmosphere.

Lower limit of detection

The lower limit of detection is 0.1 parts per billion (1 part in 1010 parts of air) by volume.

Separation of hydrocarbons

Two separate columns are recommended for the separation of hydrocarbons.

Temperature programming

Programmed temperature is needed for the separation of complex mixtures of hydrocarbons.

The Bureau of Indian Standards (BIS) published IS 5182-21 in 2001. It was reviewed in 2022.