Aim To determine the level of sinapine thiocyanate and select the optimal extracting procedure for Semen Sinapis albae,Rhizoma Corydalis and Radix Kansui.

• 目的测定芥子碱硫氰酸盐的含量,并优选白芥子与延胡索、甘遂合并提取的最佳工艺。