不同涂膜处理对冷鲜羊肉贮藏品质的影响

摘要

为了解涂膜处理对冷鲜羊肉贮藏品质的影响,本试验研究了羧甲基纤维素(CMC)、海藻酸钠和壳聚糖3种涂膜剂处理冷鲜羊肉后,样品在贮藏过程中菌落总数、pH值、汁液损失、色泽和挥发性盐基氮(TVB-N)的变化情况.结果表明:2％壳聚糖乙酸溶液能够有效地抑制冷鲜羊肉表面杂菌的生长繁殖、减缓pH值及TVB-N含量的上升速度、降低贮藏过程中的汁液损失率,阻止肉色指标亮度(L*)值、红度(a *)值和黄度(b*)值的快速下降,总之,2％壳聚糖乙酸溶液对冷鲜羊肉贮藏品质有明显改善作用;2％的羧甲基纤维素和海藻酸钠溶液,对冷鲜羊肉贮藏品质没有改善作用.%To understand the effect of carboxymethyl cellulose (CMC),sodium alginate and chiotosan treatments on chilled mutton quality under 0 ～4℃ storage,the total bacterial count,pH value,juice loss,color and luster,and volatile base nitrogen(TVB-N) were determined and analyzed.The results showed that 2％ chitosan acetic acid solution could effectively inhibit the growth and reproduction of bacteria on the surface of chilled mutton,slow down the increase of pH value and TVB-N content,reduce the juice loss rate,and prevent the meat color indexes (L*,a*,b *) decrease rapidly.In conclusion,2％ chitosan acetic acid solution significantly improved the storage quality of chilled mutton,while 2％ CMC and sodium alginate solutionhad no significant effects on that.