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Table 3 Results of antioxidant activity assays.

From: Antioxidant activity relationship of phenolic compounds in Hypericum perforatumL.

 

DPPH

SO

LP

NO

FRAP

Fractions

IC 50 [μg/mL]

[μg/umol]a

IC 50 [μg/mL]

IC 50 [μg/mL]

IC 50 [μg/mL]

[mg Fe/g]b

I/1

1.55

69.2

11.1

2.25

32.8

80.0

I/2

1.09

48.7

1.86

7.92

> > 22

104.0

I/3

6.66

297

11.7

17.8

53.7

10.0

I/4

32.8

1464

20.6

2.33

> 120

7.00

I/5

11.0

491

32.4

8.09

53.7

12.0

II/2s

0.520

23.2

7.10

7.00

83.9

25.0

II/2p

1.16

51.8

5.70

12.2

30.2

44.0

II/3

2.61

117

8.80

8.31

6.11

17.0

BHT

8.28

369

n/ac

0.859

n/a

25.3

BHA

12.4

553

n/a

0.138

n/a

n/a

  1. a mass of extract (in μg) needed for 50% neutralization of 1 μmol of DPPH
  2. b mass of Fe3+ that can be reduced by 1 g of H. perforatum fraction.
  3. c 50% inhibition not reached