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Table 3 Antioxidant activity of S. crispus leaves, extracted with different solvent and collected from three different locations

From: Phytochemical constituents and biological activities of different extracts of Strobilanthes crispus (L.) Bremek leaves grown in different locations of Malaysia

Sampling location Solvent DPPH free radical scavenging activity (%) IC50 (μg/mL) Ferric reducing antioxidant potential (μM of Fe (II)/g) IC50 (μg/mL)
Penang aqueous 54.6 ± 2.776c 78.3 ± 2.64c 117.6 ± 4.305g 80.6 ± 3.47c
ethanol 41.7 ± 3.261f 146.5 ± 3.60a 59.8 ± 4.026h 148.3 ± 3.48a
Selangor aqueous 62.4 ± 2.226b 58.2 ± 2.01d 180.6 ± 6.208e 63.2 ± 2.16d
ethanol 49.2 ± 1.894e 117.6 ± 2.64b 126.7 ± 4.550f 122.6 ± 2.77b
Kelantan aqueous 73.8 ± 3.385a 44.1 ± 3.16e 267.5 ± 9.568b 52.8 ± 1.76e
ethanol 55.4 ± 2.628c 80.5 ± 3.28c 201.8 ± 7.452d 80.7 ± 3.04c
BHT 51.6 ± 3.441d 37.5 ± 1.59f 250.6 ± 7.255c 40.7 ± 1.15f
α-tocopherol 60.2 ± 4.266b 26.4 ± 1.24g 322.1 ± 10.150a 29.1 ± 1.52g
  1. All analyses are the mean of triplicate measurements ± standard deviation. Means not sharing a common letter in each column were significantly different at p < 0.05