capillary-column chromatography

Capillary-column chromatography is a method used in analytical chemistry to separate mixtures. In this technique, a liquid or gas solution of the mixture flows through a long capillary tube that has a thin film of an adsorbent liquid coating its inner walls. Components of the mixture separate because they move through the tube at different speeds, depending on how much they interact with the stationary material. This interaction, or affinity, for the stationary phase causes different substances to distribute themselves differently as they travel through the column, leading to separation. This method is a form of column chromatography where the stationary phase is coated onto the inside wall of a small-diameter tube.123