摘要
目的:建立了基于全面稳定性指数(global stability index,GSI)理论预测庄河大骨鸡保质期的新方法。方法:基于恒温加速实验,测定大骨鸡于4、10、20、30℃储藏温度下的感官、汁液流失率、菌落总数和挥发性盐基氮变化规律,建立大骨鸡GSI保质期预测模型。结果:计算得到的GSI值满足零级动力学模型。活化能和指前因子分别为25.52 kJ/mol和11027。GSI实验值和预测值相对误差绝对值在10%范围内。通过GSI模型预测,获得大骨鸡在4、10、20、30℃下的保质期分别为5.9、4.7、3.2、2.3 d。结论:建立的GSI预测模型在4~30℃储藏温度范围内能够有效预测大骨鸡的新鲜度。
Objective A new shelf life predicting method based on Global Stability Index(GSI)theory was established for Zhuanghe Dagu Chicken.Method For the purpose of establishing GSI-based model,quality degradation trend of the chicken including sensory score,drip loss,total aerobic counts and volatile base nitrogen was monitored via accelerating testing at 4,10,20 and 30℃.Result The calculated results of GSI were satisfactorily described by a zero-order kinetic model.The activation energy and the corresponding pre-exponential constant of GSI were 25.52 kJ/mol and 11027,respectively.Relative error absolute values between predicted and observed GSI values were all below 10%.The product shelf life at 4,10,20 and 30℃was calculated to be 5.9,4.7,3.2 and 2.3 d,respectively.Conclusion The established model based on GSI could effectively predict the freshness of Zhuanghe Dagu Chicken at the range of 4 and 30℃during different temperatures storage.
作者
薛伟锋
沈葆真
田卓
于雪
刘东言
XUE Wei-feng;SHEN Bao-zhen;TIAN Zhuo;YU Xue;LIU Dong-yan(Technical Center of Dalian Customs,Dalian 116600,China;China Inspection(Dalian)Test Technology Co.Ltd.,Dalian 116600,China)
出处
《中国食物与营养》
2021年第4期26-30,共5页
Food and Nutrition in China
基金
辽宁省自然科学基金博士启动基金(项目编号:2019-BS-008)。
关键词
庄河大骨鸡
保质期
温度
全面稳定性指数
Zhuanghe Dagu Chicken
shelf life
temperature
Global Stability Index
