Screening of Profiles of Essential Oils from the Aerial Parts of Sclerorhachis platyrachis (Boiss.) Podlech ex Rech.f. Using Classical and Microwave-based Methods: Comparison with the Volatiles Using Headspace Solid-Phase Microextraction

摘要

Chemical profiles of the essential oils and volatile compounds from the aerial parts of Sclerorhachis platyrachis (Boiss.) Podlech ex Rech.f. obtained through hydrodistillation (HD), solvent-free microwave extraction (SFME), microwave assisted hydrodistillation (MAHD) and headspace solid-phase microextraction (HS-SPME) methods were subsequently investigated by means of GC and GC-MS instruments. Totally, 22, 29, 23 and 17 components were identified in the chemical profiles, representing 98.9 %, 96.5 %, 97.6 % and 97.0 % of the total compositions when using the HD, HS-SPME, SFME and MAHD methods, respectively. In all of the samples, more than fifty seven percent of the total structure consisted of monoterpene hydrocarbons. In addition, the second rank of the natural compounds was due to the oxygenated monoterpenes using the aforementioned techniques. beta-Pinene was the main constituent in all chemical profiles, while the second rank was related to camphor with the exception of the volatile profile using the HS-SPME approach having more contents of alpha-pinene (13.4 %) and limonene (9.7 %) than camphor (8.2 %).