Concentration

(µg/ml)

Reductive capability (absorbance at 700nm)

Phloretin (%)

Standard ascorbic acid (%)

20

0.28 ± 0.03

0.31 ± 0.03

40

0.54 ± 0.05

0.65 ± 0.05

60

0.72 ± 0.06

0.79 ± 0.07

80

0.85 ± 0.07

0.92 ± 0.08