Improved microwave steam distillation apparatus for isolation of essential oils: Comparison with conventional steam distillation - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Journal of Chromatography A Year : 2008

Improved microwave steam distillation apparatus for isolation of essential oils: Comparison with conventional steam distillation

Abstract

Steam distillation (SD) is routinely used by analysts for the isolation of essential oils from herbs, flowers and spices prior to gas chromatographic analysis. In this work, a new process design and operation for an improved microwave steam distillation (MSD) of essential oils from aromatic natural products was developed. To demonstrate its feasibility, MSD was compared with the conventional technique, SD, for the analysis of volatile compounds from dry lavender flowers (Lavandula angustifolia Mill., Lamiaceae). Essential oils isolated by MSD were quantitatively (yield) and qualitatively (aromatic profile) similar to those obtained by SD, but MSD was better than SD in terms of rapidity (6 min versus 30 min for lavender flowers), thereby allowing substantial savings of costs in terms of time and energy. Lavender flowers treated by MSD and SD were observed by scanning electron microscopy. Micrographs provide evidence of more rapid opening of essential oil glands treated by MSD, in contrast to conventional SD

Dates and versions

hal-02665421 , version 1 (31-05-2020)

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Naima Sahraoui, Maryline Vian, Isabelle Bornard, Chahrazed Boutekedjiret, Farid Chemat. Improved microwave steam distillation apparatus for isolation of essential oils: Comparison with conventional steam distillation. Journal of Chromatography A, 2008, 1210 (2), pp.229-233. ⟨10.1016/j.chroma.2008.09.078⟩. ⟨hal-02665421⟩
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