Page 23 - CS03_Hudz

CONCLUSIONS

 The total content of flavonoids in the extracts

ranged from 10 to 166 mg/L. Supposing that

flavonoids are present in the form of aglicons

we can assume that our beebread samples

contain mainly flavons as the maximum

absorbance of extracts in their differential

spectra are less than 415 nm, namely in the

range of 406.9–411.7 nm.

 But on the other hand, there is the following

regularity for absorption maxima of flavonols: at

substitution of the C-3 hydroxyl group

absorption maximum of complex of flavonoids

with AlCl is shifted the left.
3

 For this reason, we assume that our bee bread
sample can contain flavonols mainly in the form

of glycosides and flavons.