The research on extraction of soybean isoflavones
The optimum extraction conditions of isoflavones from soybean and soybean sprouts were researched by using orthogonal design. The effects of alcohol concentration, temperature, time and the ratio of material to solvent influence extraction of isoflavones from soybean and soybean sprouts differently. The optimum conditions were respectively: the temperature 80 ℃ , the alcohol concentration 70% , the ratio of material to solvent 1∶20, the extraction time 2 hours and the alcohol concentration 70%, the temperature 80 ℃, the length of soybean sprouts 6 mm, the ratio of material to solvent 1∶14, the yield were 1854 μg/g and 2105 μg/g under the optimum conditions. This experiment provides basis for extracting soybean isoflavone of industry production.