Preparation and Blending Performance of Compound Nutritious Purple Sweet Potato Powder
In this project,the whole purple sweet potato powder prepared by vacuum freeze-drying technology was used as the main raw material,supplemented by oat flour,knojac powder,skimmed milk powder and xylitol to prepare compound nutritious purple sweet potato powder.The results showed that the best formula of compound nutritious purple sweet potato powder was purple sweet potato flour of 2.8 g(26.4％),konjac powder of 0.6 g(5.7％),oat flour of 2.8 g(26.4％),skim milk powder of 4 g(22.6％),and xylitol of 2.0 g(18.9％).The optimal preparation temperature of compound nutritious purple sweet potato powder was 75 ℃,the optimal preparation water volume(meal replacement powder quality/flushing water volume)was 1:8,the lumping rate was 0.53％,the wetting and sinking properties and instant solubility were good.
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