capillary column
Quick Summary
A capillary column is a type of chromatography column, which is a fundamental instrument in analytical chemistry used for separating chemical substances. In chromatography, there are two phases: a stationary phase and a mobile phase. The stationary phase is typically a solid material, like silica or alumina, packed into a tube or forming the walls of a capillary. The mobile phase, which can be a liquid or a gas, flows through the column, carrying the sample to be separated.123
Different components of the sample interact with the stationary phase to varying degrees. Those with a stronger affinity for the stationary phase move more slowly through the column, while those with weaker affinities move faster. This difference in migration speed allows for the separation of the sample's components. Gas chromatography often uses capillary columns, where an inert gas serves as the mobile phase.132
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- chromatographySubsequent developments
…or Golay, columns, now called open-tubular columns and characterized by their open design and an internal diameter of less than one millimetre, had an explosive impact on chromatographic methodology. It is now possible to separate hundreds of components of a mixture in a single chromatographic experiment.
Read More…or Golay, columns, now called open-tubular columns and characterized by their open design and an internal diameter of less than one millimetre, had an explosive impact on chromatographic methodology. It is now possible to separate hundreds of components of a mixture in a single chromatographic experiment.
Read More - chromatographyPlanar chromatography
…mobile phase, which, driven by capillary action, moves through the bed perpendicular to the surface of the mobile phase. This capillary motion is rapid compared to solute diffusion in the mobile phase at right angles to the migration path, and so the solute is confined to a narrow path.
Read More…mobile phase, which, driven by capillary action, moves through the bed perpendicular to the surface of the mobile phase. This capillary motion is rapid compared to solute diffusion in the mobile phase at right angles to the migration path, and so the solute is confined to a narrow path.
Read More