Table 4.

IC₅₀ (mg/mL) values of crude extracts from C. procera, P. spiralis, and P. tomentosa and standards using the DPPH, ABTS, HDR, and FIC methods.

Plant	Crude	DPPH	ABTS	HDR	FIC
C. procera	Butanol	0.26 ± 0.02	0.10 ± 0.01	0.52 ± 0.01	1.31 ± 0.07
	Aq. methanol	0.35 ± 0.01	0.25 ± 3.0 × 10−3	0.86 ±0.02	0.85 ± 0.03
	Water	0.40 ± 0.01	0.58 ± 0.02	0.06± 0.01	0.09 ± 0.01
P. spiralis	Butanol	0.15 ± 0.02	8.60 × 10−5 ± 1.0 × 10−5	0.29 ± 0.03	0.72 ± 0.02
	Aq. methanol	0.54 ± 0.04	0.07 ± 3.0 × 10−3	0.37 ± 0.02	1.77 ± 0.13
	Water	1.16 ± 0.01	0.48 ± 0.01	1.16 ± 0.03	1.72 ± 0.02
P. tomentosa	Butanol	0.35 ± 0.04	0.11 ± 0.01	0.88 ± 0.02	2.67 ±0.23
	Aq. methanol	0.54 ± 0.01	0.15 ± 0.01	0.43 ± 0.09	0.26 ± 0.03
	Water	0.83 ± 0.04	0.49 ± 0.02	0.72 ± 0.04	0.44 ± 0.01
Ascorbic acid (Vit. C)		1.78 × 10−3 ± 6.0 × 10−5	1.58 × 10−3 ± 3.0 × 10−5	2.6 × 10−3 ± 3.0 × 10−5	1.89 × 10−3 ± 2.00 × 10−5
α-tocopherol		2.33 × 10−3 ± 4.0 × 10−5	1.79 × 10−3 ± 1.0 × 10−5	-	-
EDTA		-	-	0.013 ± 1.5 × 10−5	0.02 ± 1.1 × 10−5