Zhang J, Bo S, Zhang Y, Xu H
Experimental Pharmaceutical Factory, Beijing College of TCM.
Zhongguo Zhong Yao Za Zhi. 1990 May;15(5):287-9, 318.
The indigotin and indirubin contents of Radix Isatidis, its aqueous extract and residues, as well as extract with 95%, 50% alcohol were determined by TLC-densitometry. The authors throw doubt upon the current processes of extracting with water and precipitating with alcohol for Radix Isatidis, and indicate that the method of extraction with alcohol can give more indigotin and indirubin.
采用薄层扫描法测定了板蓝根及其水提物、药渣以及95%、50%乙醇提取物中靛蓝和靛玉红的含量。作者对目前板蓝根水提取醇沉淀的工艺提出质疑，并指出乙醇提取法可得到更多的靛蓝和靛玉红。
