Table 7.

IC₅₀ values (μM) determined against DPPH radicals applied in methanol or aqueous methanol after standard and modified reaction times (radical solution in methanol).

Antioxidant	50% MeOH + MeOH 30 min	80% MeOH + MeOH 30 min	MeOH 10 min	MeOH 30 min	MeOH 120 min
gallic acid	7.29	10.69	10.90	9.21	9.61
ferulic acid	26.66	54.79	53.77	41.78	35.75
catechin	11.82	20.74	25.15	23.43	12.77
quercetin	N.A. 1	11.17	15.82	9.45	9.71
propyl gallate	9.38	13.46	11.36	10.40	10.08
glutathione	57.72	N.A.	N.A.	N.A.	N.A.
carnosine	N.D. 2	N.A.	N.A.	N.A.	N.A.
cysteine	46.39	N.A.	N.A.	N.A.	N.A.
histidine	V.N.D. 3	N.A.	N.A.	N.A.	N.A.
ascorbic acid	30.79	36.40	30.58	30.90	31.25
ascorbyl palmitate	N.A.	N.A.	24.02	23.60	21.89
α-tocopherol	N.A.	N.A.	23.25	22.56	21.11
Trolox	24.55	31.27	11.21	10.70	10.73
phenolic mixture	11.27	N.T. 4	22.13	21.23	16.17
polar mixture	16.96	N.A.	N.A.	N.A.	N.A.
applicable compounds mixture	N.A.	N.A.	24.92	24.27	18.62

¹ N.A.—not applicable. ² N.D.—activity not detected. ³ V.N.D.—value not determined. ⁴ N.T.—not tested.