应用天然产物 ›› 2020, Vol. 10 ›› Issue (2): 67-76.DOI: 10.1007/s13659-020-00236-2
Dezhi Yang1, Bin Su2, Yancai Bi2, Li Zhang1, Baoxi Zhang1, Junke Song3, Yang Lu1, Guanhua Du3
Dezhi Yang1, Bin Su2, Yancai Bi2, Li Zhang1, Baoxi Zhang1, Junke Song3, Yang Lu1, Guanhua Du3
摘要: Salvianolic acid A (Sal A), a water-soluble ingredient in Danshen, has various biological activities. Sal A and its impurities have similar physical and chemical properties, as well as strong reducibility; therefore, they are difficult to prepare and purify. In this study, high-purity Sal A was obtained by purification of sephadex chromatography and preparative chromatography. Furthermore, HPLC-DAD tandem ECD and HPLC-DAD tandem MS methods were used for non-volatile organic impurity analysis, ICP-MS method was used for non-volatile inorganic impurities and mass balance method and quantitative nuclear magnetic resonance were employed to certify the product. The structures of Sal A and its relative impurities were validated by nuclear magnetic resonance spectroscopy and mass spectrometry, and their contents were quantified as well. Following the principles of ISO Guides 34:2009 and 35:2005, a Sal A reference material was certified, covering homogeneity studies, stability studies, characterization, and uncertainty estimations.