Total Phenolics, Total Tannins and Antioxidant Activity of Cassia fistula L. Extracts of Bark, Stem, Leaf and Root under Different Age Classes

Indian Laburnum (Cassia fistula L.) bark, stem, leaf and ischolar_main under different age classes namely Class A (2-3 years), Class B (5-10 years) and Class C (10-15 years) were analyzed for their total phenolic content (TPC), total tannin content (TTC) and antioxidant activity (AA). Both total phenolic content (TPC) and total tannin content (TTC) were determined using Folin-Ciocalteau assays and antioxidant activity (AA) was carried out by Free Radical 2, 2-diphenyl-1-picrylhydrazyl (DPPH) assay. From the study, higher TPC, TTC and AA were observed in Cassia fistula bark extracts compare to otherportion extracts (stem, leaf and ischolar_main). Bark extracts from three different age classes, showed total means of 16.67 % TPC and 3.12% TTC. In addition, bark extracts from three different age classes also showed high antioxidant activity (AA) with mean IC ₅₀ values of 0.04g/ml.