GC and GC/MS Analysis of the Volatile Constituents of the Oils of Alpinia galanga (L.) Willd and A. officinarum Hance Rhizomes

The volatile of oils obtained from the rhizomes of Alpinia galanga (L.) Wild. mid Alpinia officinarum Fiance from Imphal (NE India) were examined by GC and CC/MS. The yields of the oil were found to be 0.73% and 0.24%, respectively. A total of seventy-five compounds were identified in the oils. The major constituents were 1,8-cineole (53.4% and 28.3%), alpha-terpineol (2.1% and 6.7%), beta-pinene (1.5% and 3.1%) and terpinen-4-ol (2.9% and 1.2%) and alpha-pinene (1.1% and 1.2%) in the oils of A. galanga and A. officinarum, respectively. Some additional compounds were also identified as beta-sesquiphellandrene (5.9%), chavicol (5.0%), beta-caryophyllene (2.7%), engenyl acetate (1.9%) and zingiberenol (1.6%) in A. galanga oil and a-fenchyl acetate (15.2%), carotol (8.9%), alpha-eudestmol (4.5%), (E)-methyl cinnamate (4.0%), camphor (3.4%), camphene (2.3%) and borneol (1.7%) in A. officinarum oil.