AIM: To compare the components of crude and processed Dryopteris Crassirhizoma Nakai by different kinds of cutting and carbonizing. METHODS: UV-spectrometry was utilized to analyze the yield and extract content. RESULTS: Dryopteris Crassirhizoma Nakai after being curshed has the maximum in the yield, the total phenol of carbonized products, the water extract and alcohol extract. CONCLUSION: There are significant differences in intrinsic quality among various processed products of Dryopteris Crassirhizoma nakai, among them the crushed one has the highest quality, which conforms to China pharmacopeia 2000 VolⅠ.
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