title: Application of derivative spectrophotometry to determination of flavonoid mixtures.
abstract: Derivative spectrophotometry (DS) was applied to determination of flavonols and a flavon in two-compound mixtures by means of 'zero-crossing' technique. Selected mixtures were, quercetin-kaempferol, quercetin-myricetin and quercetin-luteolin. The developed method was used as a complementary technique to a HPLC system, which does not separate quercetin and luteolin.
authors.affiliation: Department of Analytical and General Chemistry, Silesian Technical University, M. Strzody St. 9, 44-100 Gliwice, Poland.
authors.forename: I
authors.initials: I
authors.lastname: Baranowska
authors.forename: D
authors.initials: D
authors.lastname: Raróg