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Pertaining to chromatography.


Pertaining to chromatography.


(kro?ma-tog'ra-fe) [ chrom- + -graphy]
The separation of two or more chemical compounds in a liquid or gaseous mixture by their removal at different rates based on differential solubility and adsorption. This separation is often accomplished by letting the chemicals percolate through a column of a powdered adsorbent or by passing them across the surface of an adsorbent paper, among other techniques.chromatographic (-mat?o-graf'ik), adjective

adsorption chromatography

Chromatography accomplished by applying the test material to one end of a sheet or column containing a solid. As the material moves, the various constituents adhere to the surface of the particles of the solid at different distances from the starting point according to their chemical characteristics.

column chromatography

A form of adsorption chromatography in which the adsorptive material is packed into a column.

gas chromatography

An analytical technique in which a sample is separated into its component parts between a gaseous mobile phase and a chemically active stationary phase.

gas-liquid chromatography

Abbreviation: GLC
Chromatography in which a gas moves over a liquid, and chemical substances are separated on the liquid by their different adsorption rates.

gel filtration chromatography

A type of column chromatography in which chemicals are separated via pores according to their molecular size.

high-performance liquid chromatography

Abbreviation: HPLC
Application of high pressure to liquid chromatography technique to increase separation speed and enhance resolution.
Synonym: high pressure liquid chromatography

high pressure liquid chromatography

High-performance liquid chromatography.

paper chromatography

Chromatography in which paper strips are used as the porous solid medium.

partition chromatography

Chromatography in which substances in solution are separated by being exposed to two immiscible solvents. The immobile solvent is located between the spaces of an inert material such as starch, cellulose, or silica. The substances move with the mobile solvent as it passes down the column at a rate governed by their partition coefficient.

thin-layer chromatography

Abbreviation: TLC
Chromatography involving the differential adsorption of substances as they pass through a thin layer or sheet of cellulose or some other inert compound.
References in periodicals archive ?
High performance liquid chromatographic grade methanol, acetonitrile and o-phosphoric acid purchased from Merck (Darmstadt, Germany).
If all of these parameters are to be considered and optimized during method development, a large number of chromatographic runs are typically required.
JM Science's Sonic Reservoir Sensor System is used in laboratories to measure the levels of solvents used in unattended liquid chromatographic separations in real-time.
Simultaneous electrophoresis and chromatography (SCE) is a novel two-dimensional separation technique that allows for concurrent, orthogonal chromatographic and electrophoretic separations.
A small sampling of specific topics includes: herbal drugs and the role of chromatographic analytical methods, HPLC of carbohydrates, application of HPLC in coumarin analyses, HPLC analysis of diterpenes, secondary metabolites and amino acid derivatives, and analysis of polyacetylenes.
Various chromatographic and mass spectroscopic techniques are discussed in this book.
They cover insights from molecular simulation into the retention mechanism in reversed-phase liquid chromatography, the thermodynamic modeling of chromatographic separation, the technology and applications of ultra-performance liquid chromatography, general principles and recent developments in bio-interaction affinity chromatography, characterizing stationary phases in supercritical fluid chromatography with the solvation parameter model, the chemistry and applications of silica hydride, multidimensional gas chromatography, preparing environmental samples for chromatographic analysis, and preparing samples for gas chromatography using solid-phase microextraction with derivatization.
Phospholipid analysis challenges any chromatographic technique, mainly as a result of the nature of the analytes.
Its design included several breakthrough innovations, some of which allowed the natural gas industry to use chromatographic analysis in applications where it had not been practical before.
The two new methods employ both microscopic and high-performance thin layer chromatographic (HPTLC) techniques.