Essential oils from fresh and dry leaves of Vitex negundo (HD-Fresh, HD-Dry) were obtained by traditional hydrodistillation (HD) and microwave-assisted hydrodistillation (MHD) (MHD-Fresh, MHD-Dry). The chemical constituents of essential oil of leaves are analyzed by GC/MS technique. | ISSN 1859-1531 - THE UNIVERSITY OF DANANG, JOURNAL OF SCIENCE AND TECHNOLOGY, NO. 6(127).2018 1 CHEMICAL COMPOSITION OF ESSENTIAL OIL EXTRACTED FROM LEAVES OF VITEX NEGUNDO LINN. FROM BINH THUAN PROVINCE BY HYDRODISTILLATION AND MICROWAVE HYDRODISTILLATION Nguyen Thi My Dung1, Vo Thi Dieu Hoa4, Do Thi My Lien2, Phung Van Trung3 Pham Hong Ngoc4, Le Ngoc Hung4,* 1 National University HCM City, Ho Chi Minh City; nguyenthimydung121285@ 2 Sai Gon University, Ho Chi Minh City; liendo1612@, 3 Institute of Chemical Technology, Vietnam Academy of Science and Technology 4 Center for Research and Technology Transfer, Vietnam Academy of Science and Technology. trung_cnhh@, phamngocst@, ngoc10hung@, Abstract - Essential oils from fresh and dry leaves of Vitex negundo (HD-Fresh, HD-Dry) were obtained by traditional hydrodistillation (HD) and microwave-assisted hydrodistillation (MHD) (MHD-Fresh, MHD-Dry). The chemical constituents of essential oil of leaves are analyzed by GC/MS technique. The results indicate that the major compound of four essential oil contains the same dominant components β-caryophyllen (, , and ), eremophilene (, , and ), eucalyptol (, , and ), α-terpinyl acetate (, , and ), and sabinene (, , and ), respectively in oils obtained by MHD, HD from fresh leaves, MHD and HD from dry leaves. The total amount of sesquiterpenoid hydrocarbons ( and ) is higher than monoterpenoids ( and ) in essential oil obtained by MHD, respectively in oils from fresh and dry leaves. In contrast, the essential oil obtained by HD shows the greater concentration of monoterpenoids ( and ) than sesquiterpenoids ( and ), respectively in oils from fresh and dry leaves. By using MHD method, it is superior in terms of saving energy and extraction time although the total composition decreases with this .
