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Table 5 Correlation of IC50 values of different antioxidant activities with total phenolic and total flavonoid contents

From: Estimation of phytochemical constituents and in vitro antioxidant potencies of Brachychiton populneus (Schott & Endl.) R.Br.

Antioxidant activity Correlation R2
TFC TPC
DPPH scavenging activity 0.856** 0.852**
Hydroxyl radical scavenging activity 0.888** 0.721*
Iron chelating assay 0.988*** 0.872**
Nitric oxide scavenging activity 0.949*** 0.988***
β-Carotene bleaching activity 0.956*** 0.876**
Total antioxidant activity 0.941*** 0.977***
Total reducing power assay 0.978*** 0.953**
  1. TFC: total flavonoid content; TPC: total phenolic content
  2. Column with different *, **, *** are significantly different at p < 0.05, p < 0.01 and p < 0.001