title: Microwave-assisted isolation of essential oils from Nepeta crispa and N. racemosa and comparisons with the conventional method.
abstract: In this study microwave-assisted hydrodistillation (MAHD) has been compared with the conventional method of hydrodistillation for the extraction of the essential oils from two Iranian Lamiaceae species: Nepeta crispa Willd and N. racemosa Lam. The essential oils extracted by MAHD for 40 min were quantitatively and qualitatively (aromatic profile) similar to those obtained by conventional hydrodistillation for 3.5 h. The MAHD method yields an essential oil with higher amounts of more valuable oxygenated compounds, and allows substantial savings of costs in terms of time, energy and plant material.
authors.affiliation: Department of Chemistry, Astaneh Ashrafiyeh Branch, Islamic Azad University, Astaneh Ashrafiyeh, Iran, P.O. Box: 44415-1819. porgham54@gmail.com
authors.forename: Ameneh Porgham
authors.initials: AP
authors.lastname: Daryasari
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Soleimani
authors.forename: Azam
authors.initials: A
authors.lastname: Ghorbani
authors.forename: Homayon
authors.initials: H
authors.lastname: Kheiri
authors.forename: Mohammad Porgham
authors.initials: MP
authors.lastname: Daryasarie
mesh_terms: D004951:Esterification; D006868:Hydrolysis; D039821:Monoterpenes / Q000032:analysis; D027521:Nepeta / Q000737:chemistry* / Q000528:radiation effects; D009822:Oils, Volatile / Q000302:isolation & purification*; D010084:Oxidation-Reduction
chemical_list: D039821:Monoterpenes; D009822:Oils, Volatile