title: Effects of several variable factors on the isotope ratio by HRGC-MS.
abstract: In the isotope ratio (Ir) analysis using GC-MS, several variable factors in sampling incidental to any food analysis were investigated for yuzu fruit. The Irs of ten monoterpene hydrocarbons in yuzu essential oils from each of six fruiting positions of three trees were measured. The sign test following t-test of all the Ir values demonstrated that there was no significant difference between both sampling years of 2001 and 2002. There was also no significant variation in the Ir values among the three trees and six fruiting positions in the individual two years.
authors.affiliation: Department of Bioresources Science, Faculty of Agriculture, Kochi University, Kochi, Japan. sawamura@cc.kochi-u.ac.jp
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Sawamura
authors.forename: Atsushi
authors.initials: A
authors.lastname: Satake
authors.forename: Takao
authors.initials: T
authors.lastname: Ueno
authors.forename: Akitoshi
authors.initials: A
authors.lastname: Une
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ukeda
mesh_terms: D002957:Citrus / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006838:Hydrocarbons / Q000737:chemistry; D007554:Isotopes / Q000032:analysis*; D009822:Oils, Volatile / Q000737:chemistry; D013729:Terpenes / Q000737:chemistry
chemical_list: D006838:Hydrocarbons; D007554:Isotopes; D009822:Oils, Volatile; D013729:Terpenes