Comparison of two method of essential oil extraction: microwave-assisted hydrodistillation and hydrodistillation methods from Stachys lavandulifolia (Chai-E-Koohi)
الموضوعات :
1 - Department of Chemistry, Firoozabad Branch, Islamic Azad University, Firoozabad, Iran.
الکلمات المفتاحية: Essential oil, GC-MS, MWHD, Stachys lavandulifolia,
ملخص المقالة :
The essential oils isolated from aerial parts of Stachys lavandulifolia by hydrodistillation (HD), and microwave-assisted hydrodistillation (MWHD) techniques, were analyzed by means of GC and GC-MS methods. The oil extracted by MWHD method contained 12 com- pounds with a yield of 0.12% (w/w), representing 77.78% of the total oil. 12 compounds were identified in the volatilesfrom the aerial parts of S. lavandulifolia by HD method comprising 37.9% of the total oil in 0.12% (w/w) yield. The main components of the water distilled oil were found to Phenyl glyoxime (12.84 %), Isopulegone (7.17%), p-Mentha-2,4,(8)-diene (5.67%) while the oil extracted by MWHD method was mainly composed of dihydro indol-4- ol-2-one,5,7-dibromo-3,3-dimethyl(34.03), Benzene, (1-methyl-2-propenyl- 3-ol) (21.52%) and 7-hydroxy-bicyclo [3.3.1] non-2-en-9-one (7.55%).Also the anticlerical activities of the oils were compared by using MIC method.
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