Abstract

Essential oils (EOs) are widely used in products related to human health. Thus, providing an optimum storage condition to preserve their quality and stability is very important. The effects of various duration and storage conditions on lavandin (Lavandula × intermedia L.) EO was investigated as used the raw material of aromatherapy and health products. The watery and dehydrated samples were stored in laboratory temperature (24±2°C), refrigerator (+4°C) and freezer (-18°C) for 100 and 200 days. Also, a sample of watery and a sample of dehydrated EO were exposed to air at laboratory temperature. GC/FID-MS analyses were performed to determine the variations in the components of the stored EOs. Linalool (39.49-45.81 %) was the major component in all samples. The other main components were camphor (9.95-14.68 %), borneol (8.77-12.45 %), 4-terpineol (6.12-9.51 %), 1,8-cineole (1.27-6.79 %), linalyl acetate (3.45-4.02 %), cis-linalool oxide (0.30-4.39 %) and trans-linalool oxide (0.19-4.03 %). Due to the evaporation and conversion processes, most of the components had a decreasing or increasing tendency during the storage period. Also, components such as α-pinene, camphene, β-myrcene, γ-terpinene, α-terpinolene, trans-sabinene hydrate and D-carvone disappeared during the oxidation process. Based on observations, storage time and temperature, water presence, atmospheric gases and possibly light had destructive effects on the concentration of lavandin EO components. It can be estimated that the molecular weight, molecular structure and boiling point caused the oscillation of lavandin EO constituents under various storage conditions. According to the findings, the best storage conditions for lavandin EO were low temperature and the absence of atmospheric gases and water.

摘要

香精油（EOs）被广泛用于与人类健康有关的产品中。因此，提供最佳的保存条件以保持其质量和稳定性非常重要。的各种持续时间和存储条件对杂熏衣草（效果薰衣草×中间L.）EO被用作芳香疗法和保健产品的原料。将含水和脱水的样品在实验室温度（24±2°C），冰箱（+ 4°C）和冰箱（-18°C）中分别保存100天和200天。另外，在实验室温度下将含水样品和脱水EO样品暴露于空气中。进行了GC / FID-MS分析，以确定所存储EO的成分变化。在所有样品中，芳樟醇（39.49-45.81％）是主要成分。其他主要成分是樟脑（9.95-14.68％），冰片（8.77-12.45％），4-萜品醇（6.12-9.51％），1,8-桉树脑（1.27-6.79％），乙酸芳樟酯（3.45-4.02％） ），顺式-芳樟醇氧化物（0.30-4.39％）和反式-芳樟醇氧化物（0.19-4.03％）。由于蒸发和转化过程，大多数组分在储存期间具有减少或增加的趋势。而且，在氧化过程中，诸如α- pine烯，camp烯，β-月桂烯，γ-萜品烯，α-萜品烯，反式-bin烯水合物和D-香芹酮的成分消失了。根据观察结果，储存时间和温度，水的存在，大气中的气体以及可能的光线对熏衣草油中EO成分的浓度具有破坏性影响。可以估计，分子量，分子结构和沸点在各种储存条件下引起了薰衣草素EO成分的振荡。根据调查结果，薰衣草油EO的最佳储存条件是低温，没有大气气体和水。