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Enantiomeric analysis of β-pinene and limonene by direct coupling of reversed phase liquid chromatography and gas chromatography using absorbents as packing materials

AuthorsFlores, Gema CSIC; Ruiz del Castillo, M. Luisa CSIC ORCID ; Herraiz Carasa, Marta CSIC ORCID
Issue Date2007
CitationJournal of Separation Science 30(16): 2780-2785 (2007)
AbstractA method based on the use of absorbents as packing materials inside the interface of the online coupling between RPLC and GC is proposed for the enantiomeric analysis of β-pinene and limonene in essential oils. For that purpose, a comparison of the RSD, detection limit and recovery provided by two absorbents and one adsorbent is included in this study. The results found in this work proved the validity of absorbents as packing materials in online RPLC–GC to determine minor compounds in complex matrices. In particular, PDMS seemed to be specially useful to analyse nonpolar compounds, such as β-pinene and limonene, since it provided higher sensitivity for this kind of compounds. The developed method was applied to the evaluation of the natural and non-natural character of commercial essential oils by means of the determination of the enantiomeric composition of β-pinene and limonene.
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