Solvent-Free Microwave Extraction of Essential oil of Artemisia tschernieviana

Abstract

Solvent-free microwave extraction is a combination of microwave heating and dry distillation is performed at atmospheric conditions without adding any solvent or water. Solvent-free microwave extraction has already been applied to extraction of essential oil from plant materials. In this paper, solvent-free microwave extraction has compared with a conventional hydrodistillation, for the isolation and identification of essential oils of leaf of A. tschernieviana. In hydrodistillation and solvent-free microwave extraction methods 28 and 37 components were identified, which represented 99.39 and 99.81 % of the total composition of the oil, respectively. In this methods, b-pinene, limonene, a-pinene and g-terpinene were the main components. Experimental results show that more components were isolated and identified by solvent-free microwave extraction than those by hydrodistillation. Solvent-free microwave extraction is a good alternative for the extraction of essential oil from A. tschernieviana. Solvent-free microwave extraction is a green technology or green chemistry.