column chromatography

column chromatography

noun Chemistry.
See under chromatography.
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chromatography

[kroh-muh-tog-ruh-fee]
noun Chemistry.
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:
1725–35; chromato- + -graphy

chromatographer, noun
chromatographic [kruh-mat-uh-graf-ik, kroh-muh-tuh-] , adjective
chromatographically, adverb
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World English Dictionary
chromatography (ˌkrəʊməˈtɒɡrəfɪ)
 
n
See also gas chromatography 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)
 
chroma'tographer
 
n
 
chromatographic
 
adj
 
chromato'graphically
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

chromatography
1731, from chromato-, Latinized comb. form of Gk. khroma "color" (see chromatic) + English -graphy, from -graphia "description," from graphein "to write" (about).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

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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American Heritage
Science Dictionary
chromatography   (krō'mə-tŏg'rə-fē)  Pronunciation Key 
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 Britannica
Encyclopedia

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.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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