Folin-Ciocalteu reagent, aluminium chloride, ferric chloride, hydrogen peroxide, sodium phosphate, sodium carbonate, sodium acetate, 2,4,6-tripyridyl-s-triazine (TPTZ), ferrozine, ferrous chloride, ammonium molybdate, sulphuric acid, pottassium iodide, sodium thiosulphate (NaS 2 O 3 ), tannic acid, rutin, ascorbic acid, ethanol, acetone and methanol (HPLC grade) were procured from HiMedia Chemical Co. Mumbai, (India). All the solvents used during the study were of AR grade.