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Extraction of Morus alba leaves using supercritical CO2 and ultrasound-assisted solvent: Evaluation of β-sitosterol content
The Journal of Supercritical Fluids ( IF 3.4 ) Pub Date : 2020-01-15 , DOI: 10.1016/j.supflu.2020.104752
Kátia Andressa Santos , Elissandro Jair Klein , Mônica Lady Fiorese , Fernando Palú , Camila da Silva , Edson Antônio da Silva

In this study, extracts of Morus alba leaves were obtained by supercritical CO2 and ultrasound-assisted methods, and the results were compared to those of the conventional Soxhlet extraction. The supercritical extraction resulted in the highest yields of 1.08 and 1.11 wt%, when under the highest pressure conditions investigated (200 bar; 40 and 60 °C, respectively). The ultrasound-assisted n-hexane extraction yielded 0.83 wt% at a temperature of 60 °C, solvent-to-solid ratio of 20 mL g−1, and ultrasound intensity of 43.0 W cm-2. The major compounds identified in the extracts were the triterpenoids lanosterol acetate and lupeol acetate and the phytosterol β-sitosterol. The supercritical CO2 extraction yielded up to 155.74 mg β-sitosterol 100 g−1 leaves at 60 °C and 200 bar. The highest antioxidant activity and total phenolic content was observed for the extract obtained by Soxhlet method, 62.87 μmol g-1 extract and 6.05 mg g-1 extract, respectively.



中文翻译:

超临界CO 2和超声辅助溶剂提取桑树叶片:β-谷甾醇含量的评估

在这项研究中,提取物桑白皮通过超临界CO获得叶片2和超声辅助方法,并且对结果进行比较,以与以往的索氏提取的。在研究的最高压力条件下(分别为200 bar; 40和60°C),超临界萃取的最高收率为1.08和1.11 wt%。超声辅助Ñ正己烷提取在60℃的温度下产生了0.83%(重量),溶剂与固体20毫升克比-1,和43.0W¯¯厘米超声强度-2。提取物中鉴定出的主要化合物是乙酸三萜酯,乙酸羊毛甾醇酯和乙酸羽扇豆酚以及植物甾醇β-谷甾醇。超临界CO 2在60°C和200 bar的条件下,提取最多可得到155.74 mgβ-谷甾醇100 g -1叶。通过索氏提取法获得的提取物,62.87μmolg -1提取物和6.05 mg g -1提取物分别观察到最高的抗氧化活性和总酚含量。

更新日期:2020-01-15
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