Application of Coating Agent Containing Chitsan in the Preservation of Tofu

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.