A novel microwave-assisted steam distillation approach for separation of essential oil from tree peony (Paeonia suffruticosa Andrews) petals: Optimization, kinetic, chemical composition and antioxidant activity
A novel microwave-assisted steam distillation approach for separation of essential oil from tree peony (Paeonia suffruticosa Andrews) petals: Optimization, kinetic, chemical composition and antioxidant activity
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一种新型微波辅助蒸汽蒸馏方法从牡丹（Paeonia suffruticosa Andrews）花瓣中分离精油：优化、动力学、化学成分和抗氧化活性
DOI：
10.1016/j.indcrop.2020.112669
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发表时间：
2020-10
影响因子：
5.9
通讯作者：
Chen Fengli
中科院分区：
文献类型：
--
作者：
Zhang Qiang;Huo Ruiyun;Ma Yibo;Yan Shuangmei;Yang Lei;Chen Fengli
微波辅助蒸汽蒸馏（MSD）是在保证黄酮类化合物提取的基础上发展起来的一种从牡丹（Paeonia suffruticosaAndrews）花瓣中分离精油（EO）的高效技术。 MSD过程中，将原料与水分离，使其保持相对干燥的状态，从而有利于后续黄酮类化合物的提取。本工作对MSD工艺进行了优化，得到了最佳条件（浸泡水比1.7mL/g、浸泡时间1h、微波辐射功率540W、微波辐射时间30min）和高EO产率（0.66±0.03mg/g）。将 MSD 技术与其他参考方法在动力学模型拟合、经济价值、环境影响、EO 组成和抗氧化活性方面进行了比较。结果表明，MSD方法能够合理拟合一级动力学模型，环境友好且经济可持续，分离效率较高，能耗较低，在含氧组分比例较高、抗氧化活性较好的EO分离中具有一定优势。此外，MSD后从花瓣残渣中微波辅助提取(MAE)黄酮类化合物的效果优于微波水蒸馏后提取的黄酮类化合物，且结果与MAE和热回流提取相当。总体而言，MSD在减少黄酮类等非挥发性成分损失的前提下，是传统方法高效蒸馏EO的潜在且有力的替代方法。
Microwave-assisted steam distillation (MSD) was developed as an efficient technique for the separation of essential oil (EO) from tree peony (Paeonia suffruticosaAndrews) petals, on the basis of ensuring the extraction of flavonoids. During MSD process, the raw material was separated from water to keep it in a relatively dry state, thus contributing to the subsequent extraction of flavonoids. In this work, the optimization of MSD process was conducted to obtain the optimum conditions (1.7 mL/g water ratio for soaking, 1 h soaking time, 540 W microwave irradiation power and 30 min microwave irradiation time) and high yield of EO (0.66 ± 0.03 mg/g). The MSD technique was compared with other reference methods in terms of kinetic model fitting, economic value, environmental impact, EO composition and antioxidant activity. The result pointed out that the MSD method could be reasonably fitted by first-order kinetic model, was environmentally friendly and economically sustainable, provided higher separation efficiency, required lower energy consumption, and had certain advantages in the separation of EO with higher proportion of oxygenated components and better antioxidant activity. Furthermore, microwave-assisted extraction (MAE) of flavonoids from the petal residues obtained after MSD showed better result than that obtained after microwave hydrodistillation, and the result was comparable with MAE and heat reflux extraction. Overall, MSD is a potential and powerful alternative to traditional methods for the efficient distillation of EO, on the premise of reducing the loss of flavonoids etc. non-volatile components.
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