Gas chromatography

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Gas chromatography (GC) provides separation and quantitative analyses for volatile, thermally stable compounds in a broad variety of mixtures, from the simplest to the most complex ones. Packed columns range in sizes from capillary dimensions to preparative columns having inner dimensions of centimeter proportions. There are a number of aspects differentiating packed and capillary GC columns. While the back pressure in packed columns prohibits lengths in excess of 5–10 m, the ease of carrier flow in capillary columns allows much longer columns to be used. Their similar plate heights confer significantly greater efficiency to the capillary column. Thus, components with similar separation factors are better resolved in the capillary column, whereas packed columns must rely on phase selectivity to provide resolution in some instances. The chapter also describes an alternative mode of analysis—multidimensional gas chromatography (MDGC)—where two columns are employed, but only designated fractions are allowed to pass through the second column.
Original languageEnglish
Title of host publicationChromatography
Subtitle of host publicationfundamentals and applications of chromatography and related differential migration methods
EditorsE. Heftmann
Place of PublicationNetherlands
PublisherElsevier BV
Number of pages50
Publication statusPublished - 1 Dec 2004
Externally publishedYes

Publication series

NameJournal of Chromatography Library
ISSN (Print)0301-4770

Cite this

Marriott, P. J. (2004). Gas chromatography. In E. Heftmann (Ed.), Chromatography: fundamentals and applications of chromatography and related differential migration methods (6th ed., Vol. 69, pp. 319-368). (Journal of Chromatography Library). Elsevier BV.