A Comparative Approach: Chemical Composition of the EssentialOils from Aerial Parts of Salvia aegyptiacaby Using MicrowaveAssisted Hydrodistillation and Traditional HydrodistillationMethods

The essential oil isolation based on this technique, was successfully tested for isolation ofessential oil from plants [۱]. A new greener extraction technique, Microwave hydrodistillationwas designed and developed. The essential oil isolation based on this technique, was successfullytested for isolation of essential oil from mint plants [۲].The compositions of the oils fromaerial parts of Salvia aegyptiacaby both methods wereanalyzed using GC/MS. Identification of all components was performed by a comparison of theirmass spectra with literature data (NIST and WILEY) and by comparison of their retentionindices (RI) with those in the literature [۳, ۴]. The two oils recovered from hydrodistillation andmicrowave-assist hydrodistillaton extraction contained the same dominant components: Δ-Elemene(۱۴.۱۲%, ۱۴.۹۴%); Linalool acetate (۱۰.۲۶%, ۲۲.۱۷%); Spathulenol (۹.۴۱%, ۹.۹۴%) andShyobunol(۸.۱۹%, ۱۱.۶۱%) respectively.The method of essential oil extraction affects theirchemical compositions and biological activities.