期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1190, 期 1-2, 页码 14-17出版社
ELSEVIER
DOI: 10.1016/j.chroma.2008.02.086
关键词
microwave; hydrodiffusion; earth gravity; essential oil; extraction; Mentha spicata; Mentha pulegium
A new process design and operation for the extraction of essential oils was developed. Microwave hydrodiffusion and gravity (MHG) is a combination of microwaves for hydrodiffusion of essential oils from the inside to the exterior of biological material and earth gravity to collect and separate. MHG is performed at atmospheric pressure without adding any solvent or water. MHG has been compared with a conventional technique, hydrodistillation (HD), for the extraction of essential oil from two aromatic herbs: spearmint (Mentha spicata L.) and pennyroyal (Mentha pulegium L.) belonging to the Labiatae family. The essential oils extracted by MHG for 15 min were quantitatively (yield) and qualitatively (aromatic profile) similar to those obtained by conventional hydrodistillation for 90 min. MHG also prevents pollution through potential 90% of energy saved which can lead to greenhouse gas emission benefits. (C) 2008 Elsevier B.V. All rights reserved.
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