Technically, it is not possible as flavonoids are part of polyphenols.
Volker Schneider
One of the reasons is that total phenols are frequently measured using the Folin-Ciocalteu reagent/methods, which is very susceptible to interference from non-phenolic substances and thus yields results that are too high.
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Shabbir Hussain
The flavonoids may be greater than phenolics. The detemination/concentration solely depends upon the nature of solvent for their extraction and also the procedure used for their determination. It is possible that all the flavonids (extracted by a solvent) found by a specific procedure are not toally determined with the total phenolics. However, It is expected theoretically that phenolics have always higher concentrations as compared to flavonoids.
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