壳聚糖涂膜剂在豆腐保鲜中的应用研究

Application of Coating Agent Containing Chitsan in the Preservation of Tofu

采用壳聚糖涂膜剂对豆腐进行保鲜处理,通过正交试验对豆腐涂膜保鲜配方和工艺进行优化。根据测定豆腐样品的感官指标、菌落总数,确定豆腐涂膜保鲜效果。结果表明,豆腐的最佳涂膜保鲜配方和工艺为:柠檬酸浓度1.2%,壳聚糖浓度0.3%,淀粉浓度0.8%,80℃下浸泡4 min,并对涂膜处理的豆腐采用保鲜袋密封包装。

Tofu samples was preserved with the coating agent containing chitosan.The formula of the coating agent and treating conditions were optimized through the orthogonal experiments.The preservative effects on tofu samples were investigated by the measurement of the sensory change,aerobic plate count.The optimal formula and treating conditions included：the concentration of citric acid was 1.2%,the concentration of chitosan was 0.3%,the concentration of starch was 0.8%,tofu samples were dipped in the coating agent for 4 mins when the teperature was 80 ℃,then tofu samples were sealed into the preservative film.