The Scientific World Journal / 2013 / Article / Tab 1

Research Article

Antioxidant Potential and Oil Composition of Callistemon viminalis Leaves

Table 1

Antioxidant activity of  C. viminalis leavesa.

Extracts/fraction/standardYield (g/100 g)Total phenolic contentsb (mg/g)Total flavonoid contentsc (mg/g)DPPH, IC50 ( g/mL)Inhibition in linoleic acid system (%)

Petroleum ether2.30 ± 0.040.27 ± 0.0012.25 ± 0.0456.2 ± 0.5440.1 ± 0.52
Chloroform1.90 ± 0.020.71 ± 0.0076.53 ± 0.0638.2 ± 0.4566.4 ± 0.77
Ethylacetate2.15 ± 0.030.48 ± 0.0055.11 ± 0.0445.8 ± 0.5154.1 ± 0.52
n-Butanol2.40 ± 0.040.44 ± 0.0043.96 ± 0.0452.1 ± 0.6248.2 ± 0.52
Acetone1.95 ± 0.020.63 ± 0.0076.43 ± 0.0641.4 ± 0.5256.8 ± 0.65
Absolute methanol2.50 ± 0.040.85 ± 0.0097.96 ± 0.0828.4 ± 0.1970.2 ± 0.77
95% methanol2.20 ± 0.030.52 ± 0.0066.69 ± 0.0734.1 ± 0.4168.2 ± 0.77
90% methanol2.35 ± 0.030.75 ± 0.0075.95 ± 0.0745.2 ± 0.5156.4 ± 0.61
BHT19.2 ± 0.2292.8 ± 0.91

Values are mean ± S.D of three separate experiments.
bTotal phenolic contents expressed as gallic acid equivalent.
cTotal flavonoid contents are expressed as catechin equivalent.

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