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

From: Evaluation of selected biological capacities of Baeckea frutescens

Extract EC50 values (mg/ml)
DPPH radical scavenging activity Reducing power Assay Metal chelating Assay
Methanol 0.101 ± 0.001c 0.041 ± 0.004b 0.067 ± 0.011c
Hexane 0.347 ± 0.005e 0.162 ± 0.002d 0.047 ± 0.011b
Ethyl acetate 0.084 ± 0.001b 0.033 ± 0.001a 0.158 ± 0.004d
Water 0.110 ± 0.001d 0.026 ± 0.002a 0.039 ± 0.005a
BHA* 0.030 ± 0.001a 0.051 ± 0.001c -
EDTA* - - 0.042 ± 0.001a
  1. *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)