Subcritical water extraction (SWE) is a process for extracting phenolic and flavonoid compounds from the skin of the peanut (Arachis hypogea). The phenolic and flavonoid compounds of peanut skin were frequently recovered using a hazardous solvent in a traditional extraction procedure. Subcritical water extraction is one of the methods for overcoming the toxicity of solvents. Therefore, the study’s aim was to identify the best extraction conditions for recovering total phenolic compounds (TPC), total flavonoid compounds (TFC), and antioxidant activity from peanut skin. The solubility of TPC and TFC in subcritical water was determined using the Chrastil and Del Valle-Aguilera models. The best conditions were 10.46 MPa pressure, 12.56 mL/min water flowrate, 120 °C temperature, 375.08 mg/100 g TPC, 396.24 mg/100 g TFC, and 87.96% antioxidant activity. The Chrastil model fits the solubility of TPC and TFC in subcritical water effectively since it has the lowest average absolute relative deviation (AARD), which is 2.81% and 4.47%, respectively. The findings demonstrate that a low temperature condition is ideal for increasing TPC and TFC.

亚临界水萃取 (SWE) 是从花生 ( Arachis hypogea ) 皮中提取酚类和黄酮类化合物的工艺。）。在传统的提取过程中，经常使用危险溶剂回收花生皮中的酚类和黄酮类化合物。亚临界水萃取是克服溶剂毒性的方法之一。因此，本研究的目的是确定从花生皮中回收总酚类化合物 (TPC)、总黄酮类化合物 (TFC) 和抗氧化活性的最佳提取条件。使用 Chrastil 和 Del Valle-Aguilera 模型确定 TPC 和 TFC 在亚临界水中的溶解度。最佳条件为 10.46 MPa 压力、12.56 mL/min 水流量、120 °C 温度、375.08 mg/100 g TPC、396.24 mg/100 g TFC 和 87.96% 的抗氧化活性。Chrastil 模型有效地拟合了 TPC 和 TFC 在亚临界水中的溶解度，因为它具有最低的平均绝对相对偏差 (AARD)，分别为 2.81% 和 4.47%。研究结果表明，低温条件对于增加 TPC 和 TFC 是理想的。