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- W2014611688 abstract "In supercritical fluid chromatography (SFC), the effects of adding a co-solvent to carbon dioxide are numerous. In this work, the changes in retention and selectivity occurring when the nature of the co-solvent (methanol, ethanol, isopropanol, acetonitrile) in the SFC mobile phase is varied, are studied on seven columns with different stationary phase chemistry (cyanopropyl-, pyridine-ethyl-, phenyl-oxypropyl-, phenyl-propyl-, phenyl-hexyl-, pentafluorophenyl-propyl- and octadecyl-bonded silica). Hierarchical cluster analysis and quantitative structure-retention relationships with the solvation parameter model are employed to evaluate these effects, based on the observed retention for over a hundred probe compounds. It appears that some columns are somewhat more affected than others by the change of solvent nature. Acetonitrile induces the strongest differences, essentially due to its poor capabilities as an eluent for bases and possibly because it does not adequately cover residual silanol groups. Ethanol appears to be a possible green alternative to the most-used methanol. Some hints on a possible partition-adsorption mixed mechanism are offered. Finally, sample applications with three different test mixtures relevant to cosmetic and pharmaceutical applications (flavanones, non-steroidal anti-inflammatory drugs and barbiturates) are presented." @default.
- W2014611688 created "2016-06-24" @default.
- W2014611688 creator A5004849300 @default.
- W2014611688 creator A5054424329 @default.
- W2014611688 date "2013-08-01" @default.
- W2014611688 modified "2023-09-25" @default.
- W2014611688 title "Effects of mobile phase composition on retention and selectivity in achiral supercritical fluid chromatography" @default.
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- W2014611688 doi "https://doi.org/10.1016/j.chroma.2013.06.003" @default.
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