Different techniques have been utilized to determine the composition of Artemisia absinthum (wormwood) essential oil. The oil was fractionated on a silica gel column and each fraction analyzed by GC(RI), GC-MS and 13C NMR. This allowed the identification, for the first time in A. absinthium, of two
Oils of Artemisia nilagirica var. septentrionalis plants growing at different altitudes in Himachal Pradesh, India were hydro-distilled and analyzed by GC-GC/MS. The major constituents of the oil show variation with changes in altitude. At lower, middle and higher altitudes, the major constituents