Table 2.

Quantitative content (%) of different groups of phenolic substances in the dry extracts of Calluna vulgaris herb.

The Group of BAS (Method of Analysis)	Content, $\overline{\mathit{x}}\mathbf{\pm }\mathbf{\Delta }\overline{\mathit{x}}$, n = 9
	Water Extract	Hydroethanolic Extract
Total hydroquinone derivatives (spectrophotometry per arbutin)	10.51 ± 0.04	7.86 ± 0.03
Total hydroxycinnamic acids (spectrophotometry per chlorogenic acid)	5.87 ± 0.02	7.92 ± 0.04
Total flavonoids (spectrophotometry per rutin)	0.89 ± 0.02	2.33 ± 0.07
Total polyphenols (spectrophotometry per completely dry substance and pyrogallol)	5.95 ± 0.11	11.08 ± 0.20