滚筒干燥法制备的婴幼儿谷类辅助食品保质期研究

Research on Shelf Life of Cereal Auxiliary Food for Infants and Young Children Made by Drum Drying

对滚筒干燥法制备的、马口素铁充氮罐装的婴幼儿谷类辅助食品保质期进行预测研究。通过设计加速破坏性试验,应用化学品质衰变动力学模型于婴幼儿谷类辅助食品。依据营养素在加速试验期内的衰减情况推断产品在室温条件下的保质期。试验结果表明:该类婴幼儿谷类辅助食品水分活度值在0.2~0.3之间,有利于产品的保存。在4~5个月的加速试验期内,营养素不饱和脂肪酸二十二碳六烯酸(DHA)和花生四烯酸(AA)的衰变率最大。依据各营养素指标变化值预测产品在室温条件下保质期为20个月以上。

In this study,the shelf life of cereal auxiliary food for infants and young children made by drum drying and packed in tinplate cans with nitrogen filling was studied.Through accelerated destructive experiment,the chemical quality decay kinetic model was established for the first time,and the shelf life at room temperature was inferred according to the decay of nutrients.The results show that the water activity of cereal auxiliary food for infants is between 0.2~0.3.During the accelerated test period of 4.5 months,the decay rates of DHA and AA are the fastest.According to the variation of each nutrient index,we conclude that the shelf life of products can exceed 20 months.