Volatile compounds from leaf extracts of Juniperus excelsa growing in Syria via gas chromatography mass spectrometry

[摘要] This study reports the use of gas chromatography mass spectrometry (GC-MS) to investigate volatile compounds in leaves of Juniperus excelsa native to Syria. Leaf samples were collected from both 100-year and 10-year old J. excelsa plants. Dried leaf samples were extracted with hexane to obtain essential oil metabolites and other non-polar compounds. GC-MS was used to profile and analyze metabolites in hexane extracts. Mass spectral deconvolution and identification and analysis of KI values allowed us to characterize sixty-nine metabolites, including twenty-four monoterpenes; twenty-nine sesquiterpenes; and sixteen other compounds including alkanes. Among these sixty-nine metabolites, germacrene B, cedrol, γ-elemene, and stenol were produced in leaf extracts of both 100-year and 10-year old trees. Interestingly, we observed that ten monoterpene and nineteen sesquiterpene compounds produced in leaves of the 100-year old trees were not detected in ones of the 10-year old trees investigated. In contrast, junipene was a dominant essential oil component in leaves of the 10-year old trees, but was either just at a detectable level or undetectable in leaves of the 100-year old trees...

[学科分类] 分析化学