Comparison of liquid-liquid extraction with headspace methods for the characterization of volatile fractions of commercial hydrolats from typically Mediterranean species |
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Authors: | Paolini Julien Leandri Christelle Desjobert Jean-Marie Barboni Toussaint Costa Jean |
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Institution: | UMR-CNRS 6134 SPE, Université de Corse, Laboratoire Chimie des Produits Naturels, 20250 Corti, France. paolini@univ-corse.fr |
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Abstract: | Chemical composition of volatile fractions of nine commercial hydrolats and corresponding essential oils obtained using an industrial process were studied. The hydrolat volatile fractions were reported for the first time. A comparative study of those obtained, on the one hand, by liquid-liquid extraction (LLE) and, on the other hand, using five solid-phase microextraction (SPME) fibers and also purge-and-trap-automatic thermal desorption (P&T-ATD) was conducted with analysis performed by GC and GC/MS. The use of various techniques has resulted in a change of chromatographic profile of the hydrolat volatile fractions. Quantitative differences were established between chemical compositions of headspace and those obtained by a conventional method (LLE). Statistical analyses were carried out to summarize the results. |
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