Ohmic-assisted hydrodistillation of essential oils from Zataria multiflora Boiss (Shirazi thyme)

Summary Ohmic‐assisted hydrodistillation (OAHD) is a combination of ohmic heating and distillation, and could be considered as a novel method for the extraction of essential oils. Major problems with traditional methods are long extraction time and lower purity of the extract. In this study, OAHD wa...

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Bibliographic Details
Published in:International journal of food science & technology 2011-12, Vol.46 (12), p.2619-2627
Main Authors: Gavahian, Mohsen, Farahnaky, Asgar, Majzoobi, Mahsa, Javidnia, Katayoun, Saharkhiz, Mohammad Jamal, Mesbahi, Gholamreza
Format: Article
Language:English
Subjects:
Aerials
Aroma and flavouring agent industries
Biological and medical sciences
Economics
Electron micrographs
Essential oils
Extraction
Food industries
Foods
Fundamental and applied biological sciences. Psychology
GC-MS
hydrodistillation
linalool
ohmic-assisted hydrodistillation
Scanning
Shirazi thyme
Thyme
Thymus
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Summary:Summary Ohmic‐assisted hydrodistillation (OAHD) is a combination of ohmic heating and distillation, and could be considered as a novel method for the extraction of essential oils. Major problems with traditional methods are long extraction time and lower purity of the extract. In this study, OAHD was applied as an economic and green technology for the extraction of essential oils from Zataria multiflora Boiss. (Shirazi thyme) aerial parts and the results were compared to those obtained from hydrodistillation (HD) as a conventional method. The results showed that OAHD method had the extraction time of 32.21 ± 2.59 min while this value was about 57.21 ± 2.33 min for hydrodistillation (HD). Scanning electron micrographs of thyme leaves showed a sudden eruption of essential oil glands and their surrounding area for OAHD samples. GC–MS analysis indicated that both methods of OAHD and HD can extract the same compounds.
ISSN:0950-5423
1365-2621
DOI:10.1111/j.1365-2621.2011.02792.x