Two-dimensional chromatography is a type of chromatographic technique in which the injected sample is separated by passing through two different separation stages. This is done by injecting the eluent from the first column onto a second column. Typically the second column has a different separation mechanism, so that bands that are poorly resolved...
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http://en.wikipedia.org/wiki/Two-dimensional_chromatography
Paper 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, giving a 'map' or 'fingerprint.' Also generalised to...
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http://www.encyclo.co.uk/local/20973
Type: Term Definitions: 1. paper 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 'fin...
Found on
http://www.medilexicon.com/medicaldictionary.php?t=17397
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