| 释义 |
two-dimensional chromatography
two-dimensional chromatography[′tü ¦di¦men·shən·əl ‚krō·mə′täg·rə·fē] (analytical chemistry) A paper chromatography technique in which the sample is resolved by standard procedures (ascending, descending, or horizontal solvent movement) and then turned at right angles in a second solvent and re-resolved. two-dimensional chromatography
two-di·men·sion·al chro·ma·tog·ra·phypaper chromatography in which a spot, located originally in one corner of a sheet, is developed in one direction along one side of the sheet, after which the sheet is rotated 90° and developed, with another solvent, in the new direction; the resultant spots are thus spread over the entire paper, producing a "map" or "fingerprint." Also generalized to include chromatography followed by electrophoresis (or vice versa) and column chromatography followed by paper chromatography. |