title: Determination of the volatile composition in essential oil of Descurainia sophia (L.) Webb ex Prantl (Flixweed) by gas chromatography/mass spectrometry (GC/MS).
abstract: Exhaustive hydro-distillation of Descurainia sophia (L.) Webb ex Prantl (flixweed) collected from two different locations (Cangzhou city-Sample 1 and Beijing city-Sample 2) gave in both cases yellowish colored oils in 0.31 and 0.26% yield, respectively. Detailed chemical composition of the essential oils was analyzed by GC and GC/MS, and forty and thirty-eight compounds were identified. The results indicated that the most abundant component of Sample 1were cis-beta-ocimene (20.1%), menthol (11.27%), neoisomenthyl acetate (3.5%), alloaromadendrene (2.28%) and longicyclene (2.25%). Compared with the constituents of Sample 1, several chemical compounds such as 1,8-cineole, alpha-eudesmol, cis, trans-farnesol and beta-pinene were not detected in Sample 2 although it was similarly dominated by cis-beta-ocimene (17.12%), menthol (10.7%) and neoisomenthyl acetate (2.96%). Final analysis of the chemical constituents in the essential oils of the two samples showed similarity in their chemical composition, but the relative content of all shared chemical constituents in Sample 2 was lower than that in Sample 1.
authors.affiliation: Key Laboratory of Pesticide Chemistry and Application, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Ministry of Agriculture, Beijing 100193, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Xingang
authors.initials: X
authors.lastname: Liu
authors.forename: Fengshou
authors.initials: F
authors.lastname: Dong
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.forename: Yongquan
authors.initials: Y
authors.lastname: Zheng
authors.forename: Weili
authors.initials: W
authors.lastname: Shan
mesh_terms: D019607:Brassicaceae / Q000737:chemistry*; D002980:Climate; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D005843:Geography; D009822:Oils, Volatile / Q000032:analysis* / Q000737:chemistry*; D014835:Volatilization
chemical_list: D009822:Oils, Volatile