Table 1 IC ₅₀ (μg/mL) of different compounds separated from Eichhornia crassipes against DPPH and ABTS radical, and its relative percentage to Ascorbic acid as natural antioxidant

Crude extract

74.8 ± 4.5^f

50.8 ± 2.4^g

23.64

Compound A

99.2 ± 5.8^a

77.0 ± 3.2^c

15.6

Compound B

97.1 ± 3.9^b

78.5 ± 2.4^a

15.29

Compound C

97.4 ± 2.7^b

77.6 ± 1.3^b

15.47

Compound D

92.4 ± 6.5^e

73.2 ± 4.2^e

16.39

Compound E

95.4 ± 3.1^d

75.8 ± 2.6^d

15.84

Compound F

97.2 ± 4.6^b

77.9 ± 1.9^ab

15.40

Compound G

97.2 ± 1.6^b

75.8 ± 1.6^d

15.84

Compound H

96.5 ± 2.7^c

69.8 ± 3.0^f

17.20

Compound I

97.0 ± 5.4^b

76.8 ± 3.1^c

15.62

*BHT

8.7 ± 0.5ⁱ

5 ± 0.02^j

*BHA

11.5 ± 0.95^h

9.4 ± 0.55ⁱ

*Ascorbic acid

18.6 ± 1.0 g

12.0 ± 0.60^h

LSD 0.01

0.387

0.569