[Research on the quality changes in pre-and-post-processed pieces of Radix Polygalae].

Objective: To study the quality changes in pre-and-post-processed pieces of Radix Polygalae.

Methods: The changes of the content of senegenin and polygalacic acid were studied.

Results: The content of polygalacic acid in post-processed piece was lower than that in pre-processed piece.