Gas chromatography

From Glossary of Meteorology



gas chromatography

Analytical separation technique where the minor components in a mixture of gases are separated and resolved into individual components.

The technique requires the transmission of the gas sample through a column in the chromatograph using a mobile phase or carrier gas. The column is either packed or coated with a material for which the gases to be separated have an affinity and the strength of this affinity largely determines the time any individual component is retained in the column. Various detectors are employed in gas chromatography, from very specific compound-responsive detectors (flame photometric detector, electron capture detector, photoionization detector, etc.) to some very generally sensitive detectors (flame ionization detector, thermal conductivity detector, atomic emission detector, etc.) Gas chromatography is commonly used for the quantification of halocarbons and hydrocarbons in the atmosphere.


Copyright 2022 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact permissions@ametsoc.org. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.