This study compares the yields of different extractions methods for a Brazilian variety of Humulus lupulus using scCO₂, scCO₂ + ethanol, scCO₂ + ethyl acetate, and compressed propane. Extracts were characterized by total phenolics content (TPC), total flavonoid content (TFC), and antioxidant activity (AA). The extraction yields were from 2.7 to 10.1 wt% when using compressed propane at 20 °C and 10 MPa and scCO₂ + ethyl acetate at 80 °C and 25 MPa, respectively. Furthermore, the effect of adding ethyl acetate as a cosolvent in a semi-batch process over the extraction time and extracts properties were evaluated in comparison to the extracts obtained using scCO₂, scCO₂ + ethanol, and compressed propane. The results indicate that ethyl acetate increases the extraction yield and produces samples with higher TPC, TFC, and AA values comparing to scCO₂ + ethanol and similar values compared to pure scCO₂.

这项研究比较了使用scCO ₂，scCO ₂ +乙醇，scCO ₂ +乙酸乙酯和压缩丙烷对巴西variety草的不同提取方法的产量。提取物的特征在于总酚含量（TPC），总黄酮含量（TFC）和抗氧化活性（AA）。当分别使用20°C和10 MPa的压缩丙烷和80°C和25 MPa的scCO ₂ +乙酸乙酯时，萃取产率为2.7至10.1 wt％。此外，与使用scCO ₂，scCO ₂获得的萃取物相比，评估了在半间歇过程中在萃取过程中加入乙酸乙酯作为助溶剂的效果和萃取物性质。+乙醇和压缩丙烷。结果表明，与scCO ₂ +乙醇相比，乙酸乙酯可提高提取产率，并产生具有更高TPC，TFC和AA值的样品，而与纯scCO ₂相比，乙酸乙酯的值相似。