The effect of acetic acid on the elimination of favisminducing agents, vicine and convicine from dry faba bean seeds

The present study was used acetic acid with different concentrations (0.5, 1.0, 1.5, 2.0 and 2.5%) at various temperature degrees (5, 25, 35 and 45o C) and for many periods of time (6, 12, 18, 24, 30, 36, 42 and 48h) to eliminate vicine and convicine from dry broad beans. By using acetic acid 0.5, 1.0, 1.5, 2.0 and 2.5% at 5o C, the elimination percentages of vicine during the first 6 h of soaking were, 31.03, 51.96, 48.76, 28.22 and 26.69% while the total eliminated of vicine after 48 h soaking, 57.62, 68.89, 65.11, 54.50 and 53.08% respectively. The vicine elimination at 45o C were 66.86, 51.78, 37.65, 33.83 and 63.60% While the total vicine elimination were(80.92, 93.66, 92.89, 71.00 and 68.57% after 48 h of soaking solution). The convicine elimination percentages were 100% after 36 and 48 h at 5o C by using 1.0 and 1.5% acetic acid solution respectively. The convicine elimination was more effective at high temperatures; it was 100% after 30, 24, 24 and 48h at 35o C by using 1.0, 1.5, 2.0 and 2.5% acetic acid, while it was 100% after 24, 30, 42, 42 and 42 h at 45o C respectively. The elimination processes of vicine and convicine were associated with reduction in proteins and carbohydrates contents.