ANYL 102 |
| When compressible fluids flow through a column, the drop in pressure leads to changes in density and therefore to changes in linear velocity and, with supercritical fluids, solvating power. For packed columns, how the density changes is not completely known, especially for large pressure drops. We are using Raman spectroscopy as an on-line probe to measure the density of a supercritical carbon dioxide mobile phase along the length of a packed capillary column. We have also carried out model calculations for the flow of the fluid through the column. Determination of the density profile under varying conditions of head pressure, temperature, and particle size and comparison with the results of model calculation permits a more accurate understanding of the behavior of the mobile phase. |
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General Papers
7:00 PM-9:00 PM, Sunday, 10 September 2006 Moscone Center -- Hall D, Poster
Division of Analytical Chemistry |