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.

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。