文献类型： 外文期刊

作者： Gao, Hongfei ¹ ; Zhao, Ru ² ; Fan, Changwen ¹ ; Yang, Yang ¹ ; Wang, Zehao ¹ ; Gu, Huiyan ³ ; Yang, Lei ¹ ; Tian, Hao ⁵ ; Zhang, Qiang ⁶ ; Zhang, Xiaonan ⁷ ;

作者机构： 1.Northeast Forestry Univ, Coll Chem Chem Engn & Resource Utilizat, Harbin 150040, Peoples R China

2.Nanjing Xiaozhuang Univ, Key Lab Qual & Safety Agr Prod Nanjing, Nanjing 211171, Peoples R China

3.Northeast Forestry Univ, Sch Forestry, Harbin 150040, Peoples R China

4.Northeast Forestry Univ, Minist Educ, Key Lab Forest Plant Ecol, Harbin 150040, Peoples R China

5.Yunnan Acad Agr Sci, Agroprod Proc Res Inst, Kunming 650223, Peoples R China

6.Hebei Univ, Inst Life Sci & Green Dev, Sch Life Sci, Baoding 071002, Peoples R China

7.Jiaying Univ, Sch Life Sci, Meizhou 514015, Peoples R China

关键词： Melaleuca bracteata; Microwave gravity-assisted solvent-free distil-lation followed by extraction; Essential oil; Oleanoic acid; 3-O-acetyloleanolic acid; Betulinic acid

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：5.9； 五年影响因子：6.0 ）

ISSN： 0926-6690

年卷期： 2023 年 203 卷

页码：

收录情况： SCI

摘要： A green and efficient microwave and gravity-assisted solvent-free distillation followed by extraction (MGSFDE) approach was presented to extract essential oil, oleanoic acid, 3-O-acetyloleanolic acid and betulinic acid from Melaleuca bracteata F. Muell. 'Revolution Gold' leaves. In this process, essential oils were obtained by solvent-free distillation with the synergistic action of microwave and gravity using in situ water in fresh plant cells. Mean-while, most of the water contained in fresh plants is removed, which simplifies the operation for the subsequent extraction of strongly alcohol-soluble triterpenic acids such as oleanoic acid, 3-O-acetyloleanolic acid and betulinic acid (avoiding the drying process of plant materials), increasing the yield of triterpenic acid. For the extraction process of essential oil, the second-order kinetic model showed a better fit than the first-order kinetic model. Through single-factor, face-centered central composite design and Box-Behnken design, the operational parameters affecting MGSFDE were systematically optimized. Under optimized parameters, the yield of M. bracteata leaf essential oil was 6.05 & PLUSMN; 0.17 mL/kg DW, and the yields of oleanoic acid, 3-O-acetyloleanolic acid and betulinic acid were 28.99 & PLUSMN; 1.45, 9.21 & PLUSMN; 0.46 and 0.91 & PLUSMN; 0.05 mg/g DW, respectively. The types of compounds in the essential oil extracted at 540 W were the ones that were most similar to those in the traditional hydrodistillation (HD), and the relative content was higher, according to the results of GC-MS, principal component analysis, and heatmap analysis. Because of its greater yields, lower power consumption, lower CO2 emissions, and lower water wastage, MGSFDE is assumed to be an effective and ecologically friendly extraction process with the potential to replace traditional methods and provides a great reference for extraction studies of other aromatic plants containing volatile and nonvolatile active ingredients.