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Showing 1 to 9 of 9 for “"Packed Column SFC"”.
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Supercritical Fluid Chromatography with Chemiluminescent Nitrogen and Sulfur Detection
… detectors in supercritical fluid chromatography (SFC) is particularly evident since SFC can be used to analyze classes of compounds that are not readily amenable to either gas chromatography (GC) or liquid chromatography (LC). These compounds include species that are nonvolatile or thermally …
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Impact of modified carbon dioxide mobile phases on detection on packed-column supercritical fluid chromatography
… of supercritical fluid chromatography (SFC) and supercritical fluid extraction (SFE) which utilize supercritical fluids (SF) as the mobile phase are being realized by the scientific community. SF are more advantageous than traditionally used organic solvents because SF exhibits the …
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The evaluation of an argon and helium highly efficient microwave induced plasma as an element selective detector for packed column super critical fluid chromatography
… Recently, supercritical fluid chromatography (SFC) has gained popularity among the research community partially because SFC is much more tolerant of polar functional groups than is gas chromatorgraphy (GC). SFC can be used in applications where derivatization is not possible due to sample …
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Supercritical fluid chromatography of nitrogen-containing compounds on packed columns
… supercritical CO₂ and 1% methanol modified CO₂. Packed columns with the following stationary phases were employed: silica, octadecyl (C₁₈), propylamino (NH₂), and polystyrene-divinyl benzene (PRP). Without modifier the range of basicities which could be eluted increased in the order of silica < …
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Investigation of mass spectrometric interfaces for supercritical fluid chromatography and liquid chromatography
… coupled to supercritical fluid chromatography (SFC) and mass spectrometry (MS) were assessed with pure and methanol-modified CO₂. Factors which affect the nebulization and the subsequent desolvation of the droplets were assessed. The quantitative performance was evaluated yielding a limit of …
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Strategies for the analytical determination of thermally labile sulfur-containing environmental pollutants
… (SCD), was successfully interfaced to both packed column supercritical fluid chromatography (SFC) and microcolumn high performance liquid chromatography (micro-HPLC). The packed column SFC/SCD system was shown to be compatible with both pure CO₂ and methanolmodified CO₂ mobile phases with a …
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Biological Indicators of Forest Dieback
… of chlorophyll a and b was developed using packed column SFC. The method appears to be quite promising with its better resolution and faster analysis times as compared to FIPLC methods.<br/><br/>Sitka spruce seedlings were grown in COIR (coconut husk) and were used in and were used in a …
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Applications of supercritical fluids to the extraction and analysis of oligomers and polymer additives
… for both extraction (SFE) and chromatography (SFC). A particularly exciting area of applications has been in the field of polymeric materials. Since polymers are not discrete molecules, but, rather broad distributions of very similar compounds (oligomers), they can pose interesting challenges …
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Adiabatic Packed Column Supercritical Fluid Chromatography
… the fluid does not match the temperature of the column surroundings, a radial temperature gradient forms due to heat transfer between the column and the thermal environment surrounding the column. This radial temperature gradient causes a radial fluid density profile inside the column and radial …