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Qualitative and quantitative analyses of the total flavones in ethanol-water extracts of Phellinus spp. have been undertaken using UV- and NaNO_ 2 -Al(NO_ 3 )_ 3 -based colorimetric assays. Both methods showed high levels of precision, reproducibility and recovery, and a linear relationship between absorbance value and flavone concentration over specified ranges. Both assays appear equally valid for determining the total flavone content of Phellinus spp.
Qualitative and quantitative analyzes of the total flavones in ethanol-water extracts of Phellinus spp. Have been undertaken using UV- and NaNO 2 -Al (NO 3) 3-based colorimetric assays. Both methods showed high levels of precision, reproducibility and recovery , and a linear relationship between absorbance value and flavone concentration over specified ranges. Both Methods demonstrated equally valid for determining the total flavone content of Phellinus spp.