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Analysis of fresh and aged tea tree essential oils by using GCxGC-qMS

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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 Mondello
The 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 science

Volume

48

Issue

4

Pagination

262 - 266

Publisher

Oxford University Press

Location

Oxford, Eng.

ISSN

0021-9665

eISSN

1945-239X

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2010, Oxford University Press