title: Characterization by GC-MS of Vietnamese citrus species and hybrids based on the isotope ratio of monoterpene hydrocarbons.
abstract: The isotope ratio of monoterpene hydrocarbons was used to characterize the citrus essential oils from different species and hybrids. Citrus cold-pressed peel oils from Vietnam were analyzed for the composition and isotope ratio of monoterpene hydrocarbons by using gas chromatography-mass spectrometry. A profile of citrus essential oils on the basis of their isotope ratio values and levels of monoterpene hydrocarbons was developed for Vietnamese citrus. The molecular isotope ratios were lower than those calculated from natural abundance of 13C and 2H. In addition, the isotope ratio of the base peaks (m/z 94/93) was significantly different among the citrus essential oils from different species and hybrids. The results would be applicable for the characterization of citrus essential oils from different origins.
authors.affiliation: Department of Bioresouces Science, Faculty of Agriculture, Kochi University, B-200 Monobe, Nankoku, Kochi 783-8502, Japan.
authors.forename: Nguyen Thi
authors.initials: NT
authors.lastname: Thao
authors.forename: Takehiro
authors.initials: T
authors.lastname: Kashiwagi
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Sawamura
mesh_terms: D002957:Citrus / Q000737:chemistry* / Q000145:classification*; D004583:Electrons; D005638:Fruit / Q000737:chemistry / Q000145:classification; D008401:Gas Chromatography-Mass Spectrometry; D007477:Ions / Q000737:chemistry; D007554:Isotopes / Q000737:chemistry; D015394:Molecular Structure; D039821:Monoterpenes / Q000737:chemistry*; D015999:Multivariate Analysis; D009822:Oils, Volatile / Q000737:chemistry; D014744:Vietnam