Unformatted text preview: umn temperature is increased so that the higher boiling constituents come off the column with good resolution and at reasonable lengths of time. Temperature programming helps solve the general elution problem in gas chromatography. 5. (2 points, Skoog 27‐20) The same polar compound is gas chromatographed on an SE‐30 (very nonpolar) column and then on a Carbowax 20M (very polar) column. How will K = cs vary between the two columns? cm The distribution coefficient, K, for a polar compound will be larger on the Carbowax 20M column than on the non‐polar SE‐30 column because the compound will have a stronger interaction with the polar stationary phase, and thus more of the compound will p...
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This note was uploaded on 02/05/2013 for the course CHEM 420 taught by Professor Kelleher during the Spring '08 term at University of Illinois, Urbana Champaign.
- Spring '08