Optimization of tartaric acid extraction of anthocyanins from soybean hulls by orthogonal experiment

Objective: Optimization of tartaric acid extraction of anthocyanin from black soybean hulls. Methods: Black soybean hulls and black soybean anthocyanin content were used as raw materials and the index, the process optimization of tartaric acid extraction of black soybean anthocyanin were investigated by orthogonal experimental design. Results: The best extraction process of tartaric acid extraction of anthocyanins from black soybean hulls was the tartaric acid concentration of 40%, solidliquid ratio 1∶ 30 g/m L, extraction temperature of 60 ℃, extraction time of 150 min.According to the optimal process conditions of black soybean hulls, anthocyanin yield was 14.32 mg/g. Conclusion: The result of the experiment proves that the result is stable and has the value of production and application.