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用２、３－二氨基萘（ＤＡＮ）荧光法测定了抗癌中草药与普通中草药各１４种的硒含量，其平均值抗癌中草药高于普通中草药，两者硒有含量显著性差异（Ｐ＜０．０５）。本研究提示中草药的硒含量与其抗肿瘤活性有关，同种药用植物的中草药，由于药用部位不同，其硒含量亦有差异。
The selenium content of 14 anticancer Chinese herbal medicines and 14 common Chinese herbal medicines were determined by 2,3-diaminonaphthalene (DAN) fluorescence method. The average anticancer Chinese herbal medicine was higher than ordinary Chinese herbal medicines, and there was significant difference in selenium content between the two (P< 0.05). This study suggests that the selenium content of Chinese herbal medicine is related to its anti-tumor activity. Chinese herbal medicine of the same kind of medicinal plant has different selenium content due to its different medicinal sites.