益生菌发酵苹果浊汁贮存期品质分析与货架期预测模型  

Composition Change and Shelf Life Prediction Model of Probiotic Fermented Cloudy Apple Juice

作　　者：高振鹏[1,2] 孟掉琴 王瑜 吴霞 任耀鹏 岳田利 GAO Zhenpeng;MENG Diaoqin;WANG Yu;WU Xia;REN Yaopeng;YUE Tianli(College of Food Science and Engineering,Northwest A&F University,Yangling,Shaanxi 712100,China;Laboratory of Quality and Safety Risk Assessment for Agro-products(Yangling),Ministry of Agriculture and Rural Affairs,Yangling,Shaanxi 712100,China)

机构地区：[1]西北农林科技大学食品科学与工程学院,陕西杨凌712100 [2]农业农村部农产品质量安全风险评估实验室(杨凌),陕西杨凌712100

出　　处：《农业机械学报》2020年第9期311-318,共8页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点研发计划项目(2017YFD0400702);陕西省重点研发计划项目(2020NY-096)。

摘　　要：为明确不同贮存温度对益生菌发酵苹果浊汁品质的影响及预测发酵苹果浊汁的货架期,测定了4、25℃条件下益生菌发酵苹果浊汁色差L^*值、a^*值、b^*值、ΔE值,以及稳定系数、活菌菌体浓度、感官评分、有机酸质量浓度、糖质量浓度和香气成分等指标的变化,基于Arrhenius方程构建了发酵苹果浊汁各项品质指标货架期预测模型。结果表明:在4℃和25℃条件下,发酵苹果浊汁的b^*值、ΔE值变化符合零级反应,其他指标均符合一级动力学反应。以单指标分别建立预测模型,模型计算验证结果显示,各模型的相对误差均小于10%,偏差度和准确度不大于1.04,说明模型可以很好地预测发酵苹果浊汁贮存期的各项指标。活菌菌体浓度与其他品质指标均呈显著相关,以其建立的4℃和25℃条件下的发酵苹果浊汁货架期预测模型的预测值与实测值的相对误差小于10%,说明模型可靠、合理,可以准确预测益生菌发酵苹果浊汁的货架期。As the cloudy apple juice fermented by probiotics is prone to browning,precipitation and decrease in the number of viable bacteria during storage,the quality of cloudy apple juice fermented by probiotics is reduced and the shelf life is difficult to predict.Changes in various indicators during food storage are important factors in controlling product quality.In order to clarify the effect of different temperatures on the quality of fermented cloudy apple juice and predict the shelf life of fermented cloudy apple juice,the L^*value,a^*value,b^*value andΔE value,suspension stability,viable count,sensory score,organic acid,sugar and aroma components were measured at 4℃and 25℃.According to Arrhenius equation,various quality index prediction models were constructed.The results showed that the b^*value andΔE value of the fermented cloudy apple juice were in accordance with the zero-order reaction at 4℃and 25℃,and other indexes were consistent with the first-order kinetic reaction.The shelf life prediction model was established by single index.The test results showed that the error of each model was less than 10%,the degree of deviation and accuracy was no more than 1.04,which indicated that the model can predict the indexes of the storage period of fermented cloudy apple juice well;the number of viable counts was significantly correlated with other quality indicators.The relative error between the predicted value and the measured value of the shelf life model at 4℃and 25℃was less than 10%,which indicated that the model was reliable and reasonable,and can quickly and accurately predict the shelf life of fermented cloudy apple juice.

关 键 词：苹果浊汁 益生菌 货架期 预测模型 

分 类 号：TS255.44[轻工技术与工程—农产品加工及贮藏工程]