Theaflavin(TF) was extracted and purified from black broken tea. The purified TF possessed an absorption peak at the 363nm wavelength, and the solutions of TF remained stable under the conditions of pH3-6, below 80℃ within 60 minutes, as well as in 1%-4% Vc and 0.05-0.5mmol/L Na2SO3 solutions. Fading occurred in 0.05mol/L H2O2 solution.

完成机构：[1]HunanAcademyofAgriculluralSciences,Changsha,Hunan,410125,P.R.China [2]InstantFoodResearchCenterofHunanAgriculturalUniversity,Changsha,410128,P.R.China

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