复配型壳聚糖涂膜剂对牛肉的保鲜研究

Study on preservation effects of compound chitosan film on beef

研究了壳聚糖复合剂对牛肉的涂膜保鲜,并进行了壳聚糖浓度的单因素试验。结果表明:保鲜效果较好的壳聚糖浓度为2%。壳聚糖复合涂膜剂的组成为壳聚糖浓度为2%,冰醋酸浓度为2%,甘油浓度为1%,其中冰醋酸为溶解剂,甘油为增稠剂。经此膜涂布后的牛肉在室温下保存72h后,其菌落总数、pH值、H2S这些理化指标仍在新鲜肉的标准范围内,比对照组延长了48h。

In this paper, single factor experiment on chitosan concentration was used to study the preservation effects on beef. The results showed that the beef could be kept for longer time when the chitosan concentration was 2%. The compound chitosan film was made up of 2% chitosan, 2% glacial acetic acid and 1% lycerine, and glacial acetic acid was used as lyric agent, glycerine for＇thickening agent. Beef treated with compound chitosan film could be kept fresh for 72 h under room temperature. Its physical and chemical indexes such as total number of bacterial colony, pH, H2S were still in standard range of fresh meat, and it extended the preservation time for 48 h longer than control group.