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Determination of magnolol and honokiol in Magnoliae Cortex using supercritical fluid chromatography on-line coupled with supercritical fluid extraction by on-column trapping


Determination of magnolol and honokiol in Magnoliae Cortex using supercritical fluid chromatography on-line coupled with supercritical fluid extraction by on-column trapping



Journal of Chromatography A 786(2): 366-370



ISSN/ISBN: 0021-9673

DOI: 10.1016/s0021-9673(97)00592-x

An assay of magnolol and honokiol in Magnoliae Cortex was established by on-line supercritical fluid chromatography (SFC) coupled with supercritical fluid extraction (SFE). With an amino column as the trapping and separation column, magnolol and honokiol were extracted and focused at the column head as a narrow band, even if 5% methanol was added to the supercritical carbon dioxide as an entrainer. Addition of the entrainer improved extract efficiency, and recovery of the analytes was almost the same as for solvent extraction. Determination of analytes of interest in Magnoliae Cortex was achieved with only a few mg of sample. SFE was completed within ca. 1 min, and SFC was achieved within ca. 3 min. The consecutive procedures of extraction, concentration and analysis were completed within ca. 5 min.

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Accession: 009814051

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