School of Food Science and Technology, Henan University of Technology, Zhengzhou, China.
PLoS One. 2020 Jun 16;15(6):e0234661. doi: 10.1371/journal.pone.0234661. eCollection 2020.
Xanthoxylin was the main compound (content 44.92% of total volatiles) in the leaves of Luodian B. balsamifera, which might be the key cause of failure in collecting essential oil (EO) of the leaves using general hydrodistillation in Clevenger apparatus. A modified hydrodistillation equipped with Clevenger apparatus was designed for isolating EO from the leaves. Six EOs of Luodian B. balsamifera harvested once a month from September to next February were collected successfully. The main components of EOs were δ-elemene, α-cubenene, caryophyllene, caryophyllene epoxide, γ-eudesmol, xanthoxylin, and α-eudesmol. The EOs of Luodian B. balsamifera collected from October to December had higher antioxidant activities (ACs). Combining the principal component analysis of chemical components with the results of ACs and the yields of six EOs, the leaves of Luodian B. balsamifera were suitable to be harvested in November and December to obtain EO with high quality.
黄樟素是罗甸安息香叶片中的主要化合物（总挥发油含量的 44.92%），这可能是使用克利夫兰挥发油提取器进行常规水蒸馏法从叶片中提取精油（EO）失败的关键原因。设计了一种配备克利夫兰挥发油提取器的改良水蒸馏装置，用于从叶片中分离 EO。成功收集了从 9 月到次年 2 月每月采集一次的罗甸安息香的 6 种 EO。EO 的主要成分是δ-榄香烯、α-古巴烯、石竹烯、石竹烯氧化物、γ-桉叶醇、黄樟素和α-桉叶醇。10 月至 12 月采集的罗甸安息香 EO 具有较高的抗氧化活性（ACs）。结合化学成分的主成分分析结果以及 ACs 和 6 种 EO 的产率，罗甸安息香的叶片适合在 11 月和 12 月收获，以获得具有高质量的 EO。
