壳聚糖澄清草莓胡萝卜复合果蔬汁工艺研究

以壳聚糖为澄清剂,研究了壳聚糖添加量、果蔬汁溶液pH、澄清温度和时间对草莓胡萝卜复合果蔬汁的澄清效果。单因素试验显示:壳聚糖用量为0.25～0.4 g/L,复合果蔬汁pH为3.5～4.1,澄清温度为40℃～50℃,澄清时间为45 min～55 min时,复合果蔬汁的透光率和出汁率均达到峰值。通过正交试验获得的最佳工艺条件为:壳聚糖用量0.35 g/L,澄清时间为45 min,澄清温度为50℃,复合果蔬汁pH为4。验证试验显示此工艺条件处理的草莓胡萝卜复合果蔬汁透光率达到93.6%。

Study on Clarification of Chitosan to Mixed Drink of Strawberry and Carrot

Study the effect of the optimum chitosan amount,temperature,pH and clarification time on the mixed drink of strawberry and carrot clarification,chitosan as a clarifying agent.The results from the test of single factor showed that the optimum chitosan amount was 0.25~0.4 g/L,the temperature was 40 ℃~50 ℃,the pH was 3.5~4.1,and the clarification time 45 min~55 min respectively for clarification of mixed drink of strawberry and carrot.The results from the orthogonal test showed that the optimum technological condition for clarification of mixed drink was adding 0.35 g/L chitosan(pH 4.0) at 50 ℃ for 45 min and its transmittance of the clarified mixed drink of strawberry and carrot was 93.6%.