Analysis of Cymenes in Essential Oils: the Case ofLepechinia meyeni(Walp.) Epling

Autor:	Guy J. Collin, Hélène Gagnon, François-Xavier Garneau, Serge Lavoie, André Pichette
Rok vydání:	2010
Předmět:	Lepechinia Chromatography biology Chemistry Elution Mass spectrum Kovats retention index General Chemistry biology.organism_classification Cymenes
Zdroj:	Journal of Essential Oil Research. 22:310-313
ISSN:	2163-8152 1041-2905
DOI:	10.1080/10412905.2010.9700333
Popis:	The similarity of the mass spectra of the o-, m- and p-cymenes together with the small differences of their retention indices make it difficult to unambiguously identify the three cymene isomers. Moreover, there are discrepancies in the various data banks used as a reference in the analysis of essential oils. The authors have taken advantage of the presence of these three compounds in the oil of Lepechinia meyeni to identify the right order of elution of these compounds on both non-polar and polar columns. The order of elution on both DB-5 and S-wax 10 capillary columns is: m-, followed closely by p- and finally at some distance, o-cymene. A fourth compound having a similar mass spectrum was observed. From the literature, it was tentatively identified as 3,7,7-trimethyl-1,3,5-cycloheptatriene.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::82fc6c22e6979a1c5b36602837674fbf https://doi.org/10.1080/10412905.2010.9700333 Zobrazit plný text záznamu Plný text ve formátu PDF