New Method for Extracting and Purifying Dihydromyricetin from <i>Ampelopsis grossedentata</i>
Hongchao Hu, Fan Luo, Mingjie Wang, Zhihuan Fu, Xugang Shu
Abstract
H NMR, single-crystal X-ray diffraction, IR, and UV were used to analyze the product structure; thermogravimetry and differential thermal analysis was utilized to examine the thermal stability of DMY. The results were shown as follows. Compared with the batch extraction method, the chelation extraction method could effectively avoid the oxidation of DMY by air during the extraction and purification process, and the yield of the DMY also increased. Furthermore, this method was time-saving. Through investigating the extraction process and characterizing the structure and thermal stability of DMY, the chelating extraction method could be considered to provide a reference for commercial applications of DMY.