column chromatography [`käl·ǝm ´krō·mǝ`täg·rǝ·fē] ANALYTICAL CHEMISTRY Chromatographic technique of two general types: packed columns usually contain either a granular adsorbent or a granular support material coated with a thin layer of high-boiling solvent (partitioning liquid); open-tubular columns contain a thin film of partitioning liquid on the column walls and have an opening so that gas can pass through the center of the column. |