For the preparation of the calibration curve, l ml aliquot of 0.024, 0.048, 0.072, 0.096, 0.12, and 0.144 mg/ml methanolic gallic solution was mixed with 5 ml Folin–Ciocalteu reagent and 4 ml sodium carbonate (75 g/l).
For the preparation of the calibrationcurve, l ml aliquot of 0.024, 0.048, 0.072, 0.096, 0.12, and0.144 mg/ml methanolic gallic solution was mixed with 5 mlFolin–Ciocalteu reagent and 4 ml sodium carbonate (75 g/l).