Dynamic Model of Quality Change and Shelf-life Prediction of Cold Fresh Meat Packaged with Indicator Water Absorbing Pad

In order to study the correlation between the quality changes of cold fresh meat and storage time. In this paper,the quality change of cold fresh meat at different temperature and the change of ΔE value of indicating absorbent pad were studied. The data of TVB-N value andΔE value of indicating absorbent pad were fitted,and the dynamic model was established. A shelf life prediction model with ΔE value of indicating indicator pad as the end point was established. The results showed that the TVB-N value could establish a zero order kinetic model,and the ΔE value could establish a first-order kinetic model. The fitting coefficients R² of the two models were 0.9843(TVB-N value)and 0.9926(ΔE value),respectively. The average relative error of was 4.4% and 2.9%,respectively,both less than 10%.At the end of shelf life,the ΔE value of indicating indicator pad was 20.731,and the average relative error was 2,which was less than 10%. The model established in this paper can predict the TVB-N value of cold fresh meat in the range of 5~35 ℃,indicate the change of E value of indicating absorbent pad and the shelf life of cold fresh meat in tray packaging. It shows that the shelf-life model based on ΔE value as the end point can predict the shelf-life of cold fresh meat very well.