Analysis of the glycyrrhizic acid, liquiritin, ephedrine and methephedrine in the decoction of Ephedra-Glycyrrhiza preparated combination by HPLC-MS/MS & GC-MS
孟翔宇, 皮子凤, 宋凤瑞, 刘志强, 刘淑莹
Chinese Journal of Applied Chemistry . 2009, (07): 801 -806 .