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Table 1 ABTS free Radical scavenging assay of plant extracts using ascorbic acid as standard

From: Phenolic contents, antioxidant and anticholinesterase potentials of crude extract, subsequent fractions and crude saponins from Polygonum hydropiper L

Samples Concentrations (μg/ml) Percent inhibition (mean ± SEM) IC50(μg/ml)
Ph.Cr 1000 88.58 ± 1.12 < 0.01
500 87.65 ± 1.34
250 84.31 ± 2.15
125 77.56 ± 1.73*  
1000 88.44 ± 0.58
500 87.90 ± 0.96
Ph.Hex 250 86.28 ± 2.19 < 0.01
125 81.77 ± 1.24
1000 89.76 ± 0.71
500 87.65 ± 1.32
Ph.Chf 250 84.23 ± 1.83 < 0.01
125 79.10 ± 0.90*
1000 90.56 ± 1.06
500 87.42 ± 0.43
Ph.EtAc 250 86.42 ± 0.46 < 0.01
125 80.90 ± 1.55
1000 91.03 ± 0.35
500 90.08 ± 0.47
Ph.Bt 250 87.91 ± 0.88 < 0.01
125 83.80 ± 1.50
1000 90.56 ± 1.06
500 90.08 ± 0.47
Ph.Aq 250 87.91 ± 0.88 < 0.01
125 83.80 ± 1.50
1000 90.84 ± 0.30
500 88.72 ± 1.01
Ph.Sp 250 87.94 ± 1.13 < 0.01
125 79.80 ± 0.90*
1000 87.90 ± 0.96
500 83.08 ± 0.47
Ascorbic acid 250 79.85 ± 2.24 < 0.1
125 77.40 ± 0.20
  1. Values significantly different as compare to positive control, *P < 0.05.
  2. Values expressed as Percent inhibition (Mean ± SEM of n = 3) and IC50.