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Ohmic‐assisted hydrodistillation of essential oils from Zataria multiflora Boiss (Shirazi thyme) |
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| Authors: | Mohsen Gavahian Asgar Farahnaky Mahsa Majzoobi Katayoun Javidnia Mohammad Jamal Saharkhiz Gholamreza Mesbahi |
| Affiliation: | 1. Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, Iran;2. Medicinal & Natural Products Chemistry Research Center, Shiraz University of Medical Sciences, Shiraz, Iran;3. Department of Horticultural Sciences, School of Agriculture, Shiraz University, Shiraz, Iran |
| Abstract: | 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. |
| Keywords: | Essential oils GC– MS hydrodistillation linalool ohmic‐assisted hydrodistillation Shirazi thyme |