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- W2056189573 abstract "All stationary phase chemistries are useful to achiral packed-column supercritical fluid chromatography (pSFC), but the majority of recent applications are based on polar stationary phases of the type used in normal-phase HPLC. Some manufacturers have recently introduced pSFC-tailored stationary phases, while others simply advocate the use of selected HPLC columns among their brands for SFC use. Indeed, any column developed for HPLC use can be used with supercritical fluids. Besides, hydrophilic interaction liquid chromatography (HILIC) is facing an increasing interest. Consequently, a number of HILIC-devoted stationary phases are now commercialized by most column manufacturers. As HILIC stationary phases are polar, their possible use in pSFC seems obvious, although literature examples are not numerous. However, whether they provide acceptable peak shapes in SFC conditions is a serious concern for them to find applicability. Indeed, columns optimized for HILIC mobile phases may not be optimum for SFC mobile phases. We present the characterization of eleven HILIC-type stationary phases used with carbon dioxide–methanol mobile phases in the isocratic mode. The columns are compared in terms of their retention and separation characteristics assessed by the solvation parameter model, and based on peak shapes. For this purpose, hundred and forty-six low molecular weight molecules, comprising neutral, basic and acidic compounds, were eluted on each column. Data analysis is carried out with hierarchical cluster analysis and principal component analysis in order to define three clusters of columns with similar selectivity: the first cluster comprises neutral stationary phases like amide and diol phases; the second one comprises basic stationary phases like aminopropyl-bonded silica; the last cluster comprises bare silica stationary phases. Sample applications with three different test mixtures relevant to pharmaceutical applications (barbiturates, benzodiazepines and propionic acids) are presented to assess the complementarity of some selected columns." @default.
- W2056189573 created "2016-06-24" @default.
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- W2056189573 date "2012-08-01" @default.
- W2056189573 modified "2023-10-13" @default.
- W2056189573 title "Characterization and use of hydrophilic interaction liquid chromatography type stationary phases in supercritical fluid chromatography" @default.
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- W2056189573 doi "https://doi.org/10.1016/j.chroma.2012.05.008" @default.
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