Estimation of total flavonoid content in propolis by two complementary colometric methods

  title={Estimation of total flavonoid content in propolis by two complementary colometric methods},
  author={ChiaFu Chang and Minghua Yang and H.-M. Wen and J. C. Chern},
  journal={Journal of Food and Drug Analysis},
Flavonoids, with various biological activities, are considered as key compounds in propolis. In this study, quantitative deter minations of flavonoids in propolis were conducted by two complementary colorimetric methods, aluminum chloride method and 2,4-dini trophenylhydrazine method. Results suggested that the sum of flavonoid contents determined by the above two individual methods ma y represent the real content of total flavonoids. In this work, six raw propolis samples were investigated and… Expand
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