Erythrocyte Antioxidant Protection of Rose Hips (Rosa spp.)

Table 2

Content of total phenols in different extracts (E1–E3, without (A) or with (B) ascorbate oxidase treatment) obtained from sequential elution of a metaphosphoric acid pre-extract (PE) of rose hips, measured by the Folin-Ciocalteu method. The bias from the ascorbic acid content in the extracts to the phenol estimates is obvious. Data are presented as mg GAE/g dw rose hip powder and mg GAE/mL extract (mean ± standard deviation).

Extract	Total phenols		Total phenols
	(mg GAE/mL)		(mg GAE/g dw)
	A	B	A	B
PE (HPO3)	3.0±0.3		86.4±8.9
E1 (Eluent of PE)	3.4±0.1	2.1±0.2	24.2±1.4	15.0±1.3
E2 (20% MeOH)	5.2±0.8	4.2±0.9	12.4±1.8	10.0±2.0
E3 (100% MeOH)	2.0±0.1	1.8±0.4	4.8±0.9	4.4±0.8