Purity of carbon dioxide as limiting factor in trace-level analysis by on-line supercritical fluid extraction/capillary gas chromatography
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The usefulness of several grades of carbon dioxide for online supercritical fluid extraction/capillary gas chromatography has been studied. If trace-level work has to be performed, no single grade can be recommended for all modes of detection studied. Good-quality carbon dioxide is available for use with flame ionization and thermionic detectors. With electron-capture detection, however, distinct problems still exist.
Key WordsGas chromatography Supercritical fluid extraction GC detectors Purity of gases
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