摘 要:以胡萝卜紫薯汁为原材料,研究了鼓风干燥,真空干燥,真空冷冻干燥对胡萝卜汁紫薯蔬菜粉品质的影响。结果表明:采用不同的干燥方法所制备的胡萝卜紫薯蔬菜粉的水分含量、复水性、Vc含量、还原糖含量、总糖含量、花青素含量、β-胡萝卜素含量都存在着显著性差异。鼓风干燥的干燥时间最短,但对胡萝卜紫薯蔬菜粉品质的影响最大;真空干燥的胡萝卜紫薯蔬菜粉营养成分变化较小,且干燥效率高、耗能小;真空冷冻干燥对胡萝卜紫薯蔬菜粉营养成分的综合影响最小,但干燥时间最长、耗能最多。38928 毕业论文关键词:胡萝卜紫薯蔬菜粉;鼓风干燥;真空干燥;真空冷冻干燥
Effect of Drying Method on the Aqulity of Carrot Purple Potato Vegetable Powder
Abstract: Taking carrot purple potato juice as raw material, the effect of hot air drying, vacuum drying, vacuum freeze drying on the quality of carrot purple potato powder was studied. The results showed that the moisture content, composite water, Vc content, reducing sugar content, total sugar content, anthocyanins content and β-carotenoids content of carrot purple potato vegetable powder existed significant difference by different drying methods. The time of hot air drying was the shortest, but the effect on the quality of carrot purple potato vegetable powder was the most significant. Nutritional components of carrot purple potato vegetable powder by vacuum drying had smaller changes, high efficiency, low energy. The effect on the quality of carrot purple potato vegetable powder by vacuum freeze drying was the least, but the drying time was the longest, energy consuming was the most.
Key words: Carrot purple potato vegetable powder;Hot air drying;Vacuum drying;Vacuum freeze drying
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