FolineCiocalteu phenolreagentisusedtoobtainacrudeesti-
mate oftheamountofphenolicgroupspresentinthechitosan film.
Phenolic compoundsundergoacomplexredoxreactionwith
phosphotungsticandphosphomolybdicacidspresentinthe
FolineCiocalteu reactant.Thecolordevelopmentisduetothe
transferofelectronsatbasicpHtoreducethephosphomolybdic/
phosphotungsticacidcomplexes(Curcioetal.,2009). Theresults