shellie-analysisoffresh-2010.pdf (9.62 MB)
Analysis of fresh and aged tea tree essential oils by using GCxGC-qMS
journal contribution
posted on 2010-04-01, 00:00 authored by Peter Q Tranchida, Robert Shellie, Giorgia Purcaro, Lanfranco S Conte, Paola Dugo, Giovanni Dugo, Luigi MondelloThe present research is focused on the qualitative elucidation of the chemical profile of fresh tea tree essential oil and an oxidized, aged (circa 1984) counterpart by using the most powerful analytical tool available today for volatile analysis, namely comprehensive two-dimensional gas chromatography (GCxGC) in combination with a mass spectrometer (MS). The rapid-scanning quadrupole (q) MS system employed generated a sufficient number of spectra/s (20/s) for the reliable identification of the high-speed GCxGC peaks. The total ion current GCxGC-qMS chromatogram of the fresh product was characterized by the presence of approximately 130 unknowns. Among these, 61 peaks were assigned with spectral similarities > or = 90%, while 28 components presented MS library matches in the 80-89% range. With regards to the oxidized essential oil, about 180 volatiles were visible on the 2D plane with 63 of these characterized by library "hits" > or = 90% and 45 presenting similarities within the 80-89% range. The use of the enhanced-resolution 3D methodology enabled the full separation of the samples analyzed and, hence, a clear distinction between the essential oils.
History
Journal
Journal of chromatographic scienceVolume
48Issue
4Pagination
262 - 266Publisher
Oxford University PressLocation
Oxford, Eng.Publisher DOI
ISSN
0021-9665eISSN
1945-239XLanguage
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2010, Oxford University PressUsage metrics
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