column chromatography

column chromatography n chromatography in which the substances to be separated are introduced onto the top of a column packed with an adsorbent (as silica gel or alumina), pass through the column at different rates that depend on the affinity of each substance for the adsorbent and for the solvent or solvent mixture, and are usu. collected in solution as they pass from the column at different times compare GAS CHROMATOGRAPHY, PAPER CHROMATOGRAPHY, THIN-LAYER CHROMATOGRAPHY

* * *

a type of chromatography using a sorbent packed in a column. The sample, dissolved in a solvent, is poured in the top. Some components are retained in the column bound to the sorbent. They are then washed out (eluted) in successive aliquots of the same solvent (more strongly bound components being eluted later) or of different solvents.

Medical dictionary. 2011.

Look at other dictionaries:

  • column chromatography — Chromatography Chro ma*tog ra*phy, n. [Gr. ?, ?, color + graphy.] 1. A treatise on colors [archaic] [1913 Webster] 2. (Chem.) an analytical and preparative technique for separating substances by differences in their selective adsorption to solids …   The Collaborative International Dictionary of English

  • Column chromatography — A chemist in the 1950s using column chromatography. The Erlenmeyer receptacles are on the floor. Column chromatography in chemistry is a method used to purify individual chemical compounds from mixtures of compounds. It is often used for… …   Wikipedia

  • column chromatography — kolonėlinė chromatografija statusas T sritis Standartizacija ir metrologija apibrėžtis Chromatografija, kai medžiagos perskiriamos gėriklių pripildytoje kolonėlėje. atitikmenys: angl. column chromatography vok. Säulenchromatographie, f rus.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • column chromatography — kolonėlinė chromatografija statusas T sritis chemija apibrėžtis Chromatografija, kai stacionarioji fazė suberta į kolonėlę. atitikmenys: angl. column chromatography rus. колоночная хроматография …   Chemijos terminų aiškinamasis žodynas

  • column chromatography — noun chromatography that uses selective adsorption by a column of powders (Freq. 1) • Hypernyms: ↑chromatography * * * noun : chromatography in which the substances to be separated are introduced onto the top of a column packed with an adsorbent… …   Useful english dictionary

  • column chromatography — Chem. See under chromatography. * * * ▪ chemistry       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 …   Universalium

  • Chiral column chromatography — is a variant of column chromatography in which the stationary phase contains a single enantiomer of a chiral compound rather than being achiral. The two enantiomers of the same analyte compound differ in affinity to the single enantiomer… …   Wikipedia

  • Chromatography — Chro ma*tog ra*phy, n. [Gr. ?, ?, color + graphy.] 1. A treatise on colors [archaic] [1913 Webster] 2. (Chem.) an analytical and preparative technique for separating substances by differences in their selective adsorption to solids, by passing a… …   The Collaborative International Dictionary of English

  • chromatography — chromatographer, n. chromatographic /kreuh mat euh graf ik, kroh meuh teuh /, adj. chromatographically, adv. /kroh meuh tog reuh fee/, n. Chem. the separation of mixtures into their constituents by preferential adsorption by a solid, as a column… …   Universalium

  • Chromatography — Pictured is a sophisticated gas chromatography system. This instrument records concentrations of acrylonitrile in the air at various points throughout the chemical laboratory. Chromatography (from Greek χρῶμα chroma color and γράφειν graphein to… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.