Abstract The essential oil of the fresh leaves of Platycladus orientalis (L.), grown in four different biogeographic zones of Jordan,- (the Mediterranean, Irano-Turanian, Saharo-Arabian, and Sudanian penetration) -, were obtained by hydrodistillation and analysed by gas chromatography (GC) and gas chromatography-mass-spectrometry (GC/MS). The actual composition of the spontaneous emitted volatiles was obtained using the solid-phase-micro-extraction (SPME) method and investigated using the same chromatographic and spectroscopic methods. Hydrocarbon monoterpenes dominated the hydrodistilled oils and emissions of all regions. Bicyclic monoterpenes (sabinene, α-pinene, and α-thujene) and monocyclic α-terpinene were detected as the major constituents of the oils and emissions. Additionally, hierarchical cluster analysis (HCA) revealed that the clustering is based on the region of collection rather than the applied methodology. Differences were observed in the quantity of the obtained oils (P-values

中文翻译：

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对生长在约旦四个不同生物地理区域的 Platycladus orientalis (L.) Franco 自发排放和水蒸馏挥发物的调查

摘要 生长在约旦四个不同生物地理区域（地中海、伊朗-图拉尼亚、撒哈拉-阿拉伯和苏丹渗透）的侧柏（Platycladus orientalis，L.）鲜叶的精油通过水蒸馏获得并进行了分析。气相色谱 (GC) 和气相色谱-质谱联用 (GC/MS)。自发挥发物的实际组成是使用固相微萃取 (SPME) 方法获得的，并使用相同的色谱和光谱方法进行研究。烃类单萜在所有地区的加氢蒸馏油和排放中占主导地位。双环单萜（沙宾烯、α-蒎烯和α-thujene）和单环α-萜品烯被检测为油类和排放物的主要成分。此外，层次聚类分析 (HCA) 显示聚类基于收集区域而不是应用的方法。观察到所得油的数量存在差异（P 值