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Densitometric Determination of Kinetics of Hydrolysis of Flavonoid Glycosides

In this paper we report the possibilities and advantages of HPTLC for investigation of the acid hydrolysis of six flavonoid glycosides: the 3-arabinoside of quercetin (avicularin), the 3-glucoside of quercetin (isoquercitrin), the 3-rhamnoglucoside of quercetin (rutin), the 7-glucoside of apigenin, the 7-rhamnoglucoside of hes-peretin (hesperidin) and the 7-rhamnoglucoside of naringenin (naringin). The results obtained are discussed in the terms of the chemical structures of analyzed compounds. Quantitative determinations of flavonoids were performed by use of densitometry.