Evaluation of selected biological capacities of Baeckea frutescens

Table 2 The antioxidant capacity of extracts in DPPH radical scavenging, reducing power and metal chelating assay

Extract	EC₅₀ values (mg/ml)
Extract	DPPH radical scavenging activity	Reducing power Assay	Metal chelating Assay
Methanol	0.101 ± 0.001^c	0.041 ± 0.004^b	0.067 ± 0.011^c
Hexane	0.347 ± 0.005^e	0.162 ± 0.002^d	0.047 ± 0.011^b
Ethyl acetate	0.084 ± 0.001^b	0.033 ± 0.001^a	0.158 ± 0.004^d
Water	0.110 ± 0.001^d	0.026 ± 0.002^a	0.039 ± 0.005^a
BHA*	0.030 ± 0.001^a	0.051 ± 0.001^c	-
EDTA*	-	-	0.042 ± 0.001^a

*Positive reference standard; Values are expressed in μg/ml as mean ± standard deviation (n = 3), in each column different letters (a–d) means significantly different (p < 0.05, ANOVA)

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