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, by passing a liquid over the solid, to which the substances to be separated have usually been adsorbed in a preliminary step. The major variations are column chromatography, in which the substances to be separated are adsorbed to a column with any of a wide variety of adsorbing solids in powdered or granulated form; paper chromatography, in which the solids are applied as a spot at one end of a strip of absorbent paper (such as filter paper), and the liquid is percolated through the paper by capillary action; and thin-layer chromatography (TLC), which is similar to paper chromatography, but the adsorbent material is, instead of paper, a thin layer of finely powdered material, such as cellulose or silica, on a backing of glass or plastic, called a TLC plate. A modern version of {column chromatography} is high-performance liquid chromatography, usually referred to as HPLC. [PJC]


The Collaborative International Dictionary of English. 2000.

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  • chromatography — [krō΄mə täg′rə fē] n. [ CHROMATO + GRAPHY] any of various processes of chemical analysis in which the constituents of a mixture are separated into distinct bands or spots on an adsorbent material: see GAS CHROMATOGRAPHY …   English World dictionary

  • chromatography — chromatography. См. хроматография. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • chromatography — 1731, from chromato , Latinized comb. form of Gk. khroma (gen. khromatos) color (see CHROMA (Cf. chroma)), denoting color or chromatin + GRAPHY (Cf. graphy) …   Etymology dictionary

  • chromatography — ► NOUN Chemistry ▪ a technique for the separation of a mixture by passing it through a medium in which the components move at different rates. DERIVATIVES chromatogram noun chromatograph noun chromatographic adjective. ORIGIN from Greek khr ma… …   English terms dictionary

  • 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

  • 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 — The separation of chemical substances and particles (originally plant pigments and other highly colored compounds) by differential movement through a two phase system. The mixture of materials to be separated is percolated through a column or… …   Medical dictionary

  • chromatography — /kroʊməˈtɒgrəfi / (say krohmuh togruhfee) noun Chemistry 1. the separation of mixtures into their constituents by preferential absorption by a solid such as a column of silica (column chromatography), or a thin film of silica (thin layer… …   Australian English dictionary

  • chromatography — n. any of several techniques for separating the components of a mixture by selective absorption. Two such techniques are quite widely used in medicine, for example to separate mixtures of amino acids. In one of these, paper chromatography, a… …   The new mediacal dictionary

  • chromatography — chromatografija statusas T sritis Standartizacija ir metrologija apibrėžtis Cheminės analizės būdas, kuriuo iš cheminių junginių mišinio arba ekstrakto, judančio per paviršinį gėriklį (pvz., molį arba popierių), junginiai yra atskiriami kaip… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

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