Bioscience, Biotechnology, and Biochemistry
Online ISSN : 1347-6947
Print ISSN : 0916-8451
Analytical Chemistry Regular Papers
MS Fragment Isotope Ratio Analysis for Evaluation of Citrus Essential Oils by HRGC-MS
Atsushi SATAKEKiyoshi FURUKAWATakao UENOHiroyuki UKEDAMasayoshi SAWAMURA
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2004 Volume 68 Issue 2 Pages 312-316

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Abstract

To evaluate the origin of citrus essential oils, the isotope ratio of fragment peaks on HRGC-MS of the volatile compounds from various citrus oils was measured. The MS fragment ratio was found by the ratio of fragment peak intensity, m+1⁄m (mz). This ratio reflects the isotope effect of volatile compounds, that is, it provides information about locality, quality, and species for essential oils. Multivariate analysis based on the MS fragment ratio of monoterpene hydrocarbons clearly distinguished three citrus species, yuzu, lemon, and lime. The carbonyl fractions were also extracted from citrus essential oils by the sodium hydrogensulfite method. The isotope ratio of MS fragments of octanal, nonanal, and decanal was also examined. The results suggest that there was no significant difference in the individual fragment isotope ratios of the three aldehydes.

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© 2004 by Japan Society for Bioscience, Biotechnology, and Agrochemistry
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