Abstract:Optimization of extraction conditions for preparing insoluble dietary fiber from the Herba Patriniae was studied by single factor method coupling with L9(34) orthogonal array design with three variables of temperature, time and alkali concentration. The yield of insoluble dietary fiber was used as evaluation index. The results indicated that the optimal conditions for preparation of insoluble dietary fiber were: alkali concentration 4%, temperature40 ℃ and time 1 h. Under the optimal conditions, the experimental yield of insoluble dietary fiber was 89.46% and the product showed no rough sense and fine color. Therefore, the extraction of insoluble dietary fiber from Herba Patriniae has great feasibility in the comprehensive utilization of Herba Patriniae.
