[Preparation technology of total coumarins from Laportea bulbifera].

Objective: To investigate the preparation process of total coumarins from Laportea bulbifera.

Methods: The optimum condition for the extraction of total coumarins was studied using the orthogonal test, and the extracts was purled with different kinds of macroporous resins. The content of total coumarins was detected by ultraviolet spectrophotometry.