MS fragment isotope ratio analysis for evaluation of citrus essential oils by HRGC-MS

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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 (m/z). 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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Satake, A., Furukawa, K., Ueno, T., Ukeda, H., & Sawamura, M. (2004). MS fragment isotope ratio analysis for evaluation of citrus essential oils by HRGC-MS. Bioscience, Biotechnology and Biochemistry, 68(2), 312–316. https://doi.org/10.1271/bbb.68.312

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