Abstract

Changes of Valencia orange essential oils were evaluated under different agricultural locations (north, west and south) in Egypt. Essential oils of leaves, flowers and peels that were collected from different locations were isolated by hydro-distillation and analyzed by GC/MS. Leaf and peel samples that were collected from the south location resulted in the maximum contents ( % and ml/ 250 g) of their essential oils with the values of 0.4 %, 1.0 ml/250 g and 0.7 %, 1.8 ml/250 g, respectively. No variations were detected in the content of flower essential oil. Sabinene was the major component of leaf essential oil, while the main component of flower essen- tial oil was nerol; limonene was the major component in peel essential oil. Detected components of various essential oils belonged to four chemical groups which are monoterpene hydrocarbons (MH), oxygenated monoterpenes (OM), sesquiterpene hydrocarbons (SH) and oxygenated sesquiterpenes (OS). MH was the major group in leaf and peel essential oils while OM was the major group in flower essential oil. The maximum values of sabinene (33.6 %) and nerol (33.8 %) were recorded in the samples collected from the west location. The greatest amount (82.1 %) of limonene was obtained from samples collected from the south location. Peel samples that were harvested from the north location produced the greatest amounts of MH (88.7 %) and OM (59.6 %).

摘要

在埃及不同的农业地区（北部，西部和南部）评估了瓦伦西亚橙精油的变化。通过水蒸馏分离从不同位置收集的叶，花和果皮的香精油，并通过GC / MS进行分析。从南部地区采集的叶和果皮样品的精油含量最高（％和ml / 250 g），分别为0.4％，1.0 ml / 250 g和0.7％，1.8 ml / 250 g，分别。花香精油含量未发现变化。bin烯是叶片精油的主要成分，而花精油的主要成分是神经醇。柠檬烯是果皮精油中的主要成分。各种精油中检测到的成分属于四个化学类别，分别是单萜碳氢化合物（MH），含氧单萜（OM），倍半萜碳氢化合物（SH）和含氧倍半萜（OS）。MH是叶和果皮香精油中的主要成分，而OM是花和香精油中的主要成分。从西部地区收集的样品中记录了sa烯（33.6％）和神经醇（33.8％）的最大值。从南部地区收集的样品中获得了最大量的柠檬烯（82.1％）。从北部采集的果皮样品产生的MH（88.7％）和OM（59.6％）最多。8％）记录在从西部位置收集的样品中。从南部地区收集的样品中获得了最大量的柠檬烯（82.1％）。从北部采集的果皮样品产生的MH（88.7％）和OM（59.6％）最多。8％）记录在从西部位置收集的样品中。从南部地区收集的样品中获得了最大量的柠檬烯（82.1％）。从北部采集的果皮样品产生的MH（88.7％）和OM（59.6％）最多。