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Comparison of Total Antioxidant Capacity, Polyphenolic, and Anthocyanins Contents from Some Varieties of Dry Beans of Burkina

Adama H, Eloi P, Abdoulaye S and Mouhoussine N

Total polyphenolics (TPP), anthocyanins (TAT) contents and total antioxidant capacity (TAC) of grains and leaves from fourteen local varieties of dry beans grown in Burkina were studied using Folin-Ciocalteu, DPPH, and total anthocyanin assays. Extracted with 70% aqueous acetone, TPP, TAT contents and TAC were determined spectrophotometrically. All measurements are made in duplicates with a coefficient of variation less than 10%. In relation to those of leaves, grains extracts had the highest TAC and TPP values. Then, the highest TAC value of grains (01 CC-26 (77.57 ± 0.08 μmoles of Quercetin Equivalents (QE) per gram of dried material) is higher than the highest TAC value of leaves (Gaoua Local (GR) (9.48 ± 0.08 μmoles of QE per gram of fresh material). Indeed, between TAC values (from Gaoua Local (GR) (9.48 ± 0.08 μmoles of QE per gram of fresh material) to IT 93K-93-10 (2.84 ± 0.13 μmoles of QE per gram of fresh material) and TPP content (from 01 CC-26 (31.67 ± 0.28 μg of Gallic Acid Equivalents per gram of fresh material to IT 85F 867-5 (23.12 ± 0.04 μg of GAE per gram of fresh material) of leaves there was the best correlation (R=0.947).