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column chromatography

noun, Chemistry
1.
See under chromatography.

chromatography

[kroh-muh-tog-ruh-fee] /ˌkroʊ məˈtɒg rə fi/
noun, Chemistry
1.
the separation of mixtures into their constituents by preferential adsorption by a solid, as a column of silica (column chromatography) or a strip of filter paper (paper chromatography) or by a gel.
Origin
1725-1735
1725-35; chromato- + -graphy
Related forms
chromatographer, noun
chromatographic
[kruh-mat-uh-graf-ik, kroh-muh-tuh-] /krəˌmæt əˈgræf ɪk, ˌkroʊ mə tə-/ (Show IPA),
adjective
chromatographically, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for column-chromatography

chromatography

/ˌkrəʊməˈtɒɡrəfɪ/
noun
1.
the technique of separating and analysing the components of a mixture of liquids or gases by selective adsorption in, for example, a column of powder (column chromatography) or on a strip of paper (paper chromatography) See also gas chromatography
Derived Forms
chromatographer, noun
chromatographic (ˌkrəʊmətəˈɡræfɪk) adjective
chromatographically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for column-chromatography

chromatography

n.

1731, from chromato-, Latinized comb. form of Greek khroma (genitive khromatos) "color" (see chroma), denoting "color" or "chromatin" + -graphy. Related: Chromatograph.

Online Etymology Dictionary, © 2010 Douglas Harper
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column-chromatography in Medicine

chromatography chro·ma·tog·ra·phy (krō'mə-tŏg'rə-fē)
n.
Any of various techniques for the separation of complex mixtures that rely on the differential affinities of substances for a gas or liquid mobile medium and for a stationary adsorbing medium through which they pass, such as paper, gelatin, or magnesia. Also called absorption chromatography.


chro'ma·tog'ra·pher n.

column chromatography n.
A form of partition chromatography in which a liquid phase flows down a column packed with a solid phase.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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column-chromatography in Science
chromatography
  (krō'mə-tŏg'rə-fē)   
A technique used to separate the components of a chemical mixture by moving the mixture along a stationary material, such as gelatin. Different components of the mixture are caught by the material at different rates and form isolated bands that can then be analyzed.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for column-chromatography

column chromatography

in analytical chemistry, method for separating mixtures of substances in which a liquid or gaseous solution of the mixture is caused to flow through a tube packed with a finely divided solid, which may be coated with an adsorbent liquid, or through a long capillary tube bearing a thin film of adsorbent liquid; the components of the mixture separate because they travel through the tube at different rates, determined by the degree to which each is retarded by interacting with the stationary material. See also gas chromatography; gel chromatography.

Learn more about column chromatography with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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