Effects of electrolyte concentration and ultrasound pretreatment on Ohmic-Assisted Hydrodistillation of essential oils from Mentha piperita L

Mohsen Gavahian, Reza Farhoosh, Katayoun Javidnia, Fakhri Shahidi, Mohammad Taghi Golmakani, Asgar Farahnaky

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In this study, the effects of salt concentration (1, 3 and 6% w/v) and ultrasound pretreatment (50 W for 5, 10 and 15 minutes) on extraction parameters and extracted essential oil from peppermint by ohmic-assisted hydrodistillation (OAHD), a recently innovated extraction technique, have been studied. The results showed that salt concentration significantly affected the extraction parameters of OAHD, while ultrasound pretreatment had negligible effect. Sudden euption of essential oil glands was observed in scanning electron micrographs of all OAHDs mint leaves. GC-MS analysis did not indicate any noticeable change in the compounds of all the extracted essential oils. The results of this study showed that increase of electrolyte concentration could speed up OAHD process without any adverse effect on essential oil quality, while ultrasound pretreatment neither reduced process time nor increased extraction yield of OAHD.

Original languageEnglish
Article number20170010
Pages (from-to)1-12
Number of pages12
JournalInternational Journal of Food Engineering
Volume13
Issue number10
DOIs
Publication statusPublished - 26 Oct 2017

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