Changes in the Composition of AromatherapeuticCitrusOils during Evaporation release_52gq4aqzxvey5b6w5dm3ndbb7a

by George W. Francis, Yen Thuy Hoang Bui

Published in Evidence-Based Complementary and Alternative Medicine by Hindawi Limited.

2015   Volume 2015, p1-6


The composition of some commercial<jats:italic>Citrus</jats:italic>oils, lemon, sweet orange, and tangerine, designated for aromatherapy, was examined before and after partial evaporation in a stream of nitrogen. The intact oils contained the expected mixtures of mono- and sesquiterpenes, with hydrocarbons dominating and lesser amounts of oxygenated analogues making up the remainder. Gas chromatography-mass spectrometry was used to follow alterations in the relative amounts of the various components present as evaporation proceeded. Changes were marked, and in particular more volatile components present in the intact oils rapidly disappeared. Thus the balance of content was shifted away from monoterpene hydrocarbons towards the analogous alcohols and carbonyl compounds. The results of this differential evaporation are discussed and possible consequences for aromatherapy use are noted. The case of lemon oil was especially interesting as the relative amount of citral, a known sensitizer, remaining as time elapsed represented an increasing percentage of the total oil.
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Type  article-journal
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Year   2015
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DOI  10.1155/2015/421695
PubMed  26161120
PMC  PMC4486248
Wikidata  Q41580082
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ISSN-L:  1741-427X
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