[Quality evaluation of 3 kinds of rhizoma Drynariae]

By textral research of Chinese materia medica, commodity investigation and identification of crude drugs, it has been made clear that in the Chinese market presently the main species of Rhizoma Drynariae is Drynaria fortunei. The assay of naringin content has been set with HPLC. The average rate of recovery is 99.5%, RSD 1.9%.