2004
DOI: 10.1271/bbb.68.215
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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 … Show more

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Cited by 6 publications
(5 citation statements)
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“…Each component was initially identified by the GC retention index and the NIST library connected to the QP-5050 mass spectrometer, as described in previous papers. 12,13) Measurement of the MS fragment ratio. The MS fragment ratio was measured using the isotope ratio measurement method described in previous papers.…”
Section: Methodsmentioning
confidence: 99%
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“…Each component was initially identified by the GC retention index and the NIST library connected to the QP-5050 mass spectrometer, as described in previous papers. 12,13) Measurement of the MS fragment ratio. The MS fragment ratio was measured using the isotope ratio measurement method described in previous papers.…”
Section: Methodsmentioning
confidence: 99%
“…The MS fragment ratio was measured using the isotope ratio measurement method described in previous papers. [10][11][12] Selective ion monitoring (SIM) of GC-MS was done in order to estimate the intensities of ion peaks of each major MS fragments (m=z ¼ m) and of its þ1 fragment peaks (m=z ¼ m þ 1). The MS fragment ratio of each peak was calculated using the following equation:…”
Section: Methodsmentioning
confidence: 99%
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“…The isotope fingerprint of Japanese yuzu (Citrus junos Tanaka) essential oil has also been established as a result of various studies. [7][8][9] Citrus fruits are among the most easily hybridized species. It is natural that the composition of citrus essential oils often varies according to species, variety, ripening stage, growing place and other conditions.…”
mentioning
confidence: 99%