Objective: To determine changes of content of Tannin in different Nodus Nelumbinis Rhizomatis Charcoal.
Methods: The content of Tannin of Nodus Nelumbinis Rhizomatis Charcoal was detected by UV and colorimetric method.
Results: The content of tannin in standard sample was the highest.
Conclusion: It should be studied whether the tannin of Nodus Nelumbinis Rhizomatis Charcoal is the active ingredients of hemostasis.