摘要
为了研究河豚鱼在冷链流通中的品质变化与货架期,通过不同温度下的贮藏实验研究了河豚鱼的货架期预测模型。将河豚鱼贮藏在273、277和281K条件下,测定了河豚鱼的总菌落数、总挥发性盐基氮(TVB-N)、脂肪氧化(TBA)值和三甲胺值的变化。在Arrhenius动力学方程基础之上,建立了菌落总数、挥发性盐基氮、脂肪氧化(TBA)值和三甲胺值与贮藏时间及贮藏温度之间的动力学模型。实验表明一级化学反应动力学模型和Arrhenius方程对菌落总数、挥发性盐基氮(TVB-N)、脂肪氧化(TBA)值及三甲胺值的变化具有较高的拟合精度。各项指标(菌落总数、挥发性盐基氮、TBA值以及三甲胺)变化预测模型中的活化能(EA)及速率常数(k0)分别为:21.10kJ/mol和1.059×103,76.58kJ/mol和2.888×1013,6.59kJ/mol和4.012,18.35kJ/mol和1.393×103。结果表明:河豚鱼的总菌落数、挥发性盐基氮(TVB-N)、脂肪氧化(TBA)值及三甲胺值随着贮藏时间的延长而增加,且随着贮藏温度的升高而迅速增加。该实验建立的河豚鱼货架期预测模型所获得货架期预测值准确率达到±10%以内,可根据菌落总数和TVB-N值在273～281K范围内,对河豚鱼的剩余货架期进行预测。
To study quality changes of puffer fish during frozen storage, kinetic models were investigated at different temperatures during storage.Total Viable Count （ TVC ）, Total- Volatile Basic Nitrogen （ TVB- N ）, 2 - thiobarbituric acid （TBA） and trimethylamine（TMA） value at different storage temperatures（273,277 and 281 K） were accessed to investigate the relation between the time and temperature.The kinetic models of TVC,TVB-N,TBA and TMA value with respect to storage time and temperature were developed based on Arrhenius equation.The high regression coefficients（R2 〉0.9）indicated the acceptability of the first order reaction and Arrhenius model for predicting the changes of TVC,TVB-N,TBA and TMA value of puffer fish.Activation energies（EA） and rate constants（ k0 ） of TVC, TVB-N,TBA and TMA value were obtained.They were 21.iOkJ/mol and 1.059 × 103 ,76.58kJ/mol and 2.888 × 10＇3, 6.59kJ/mol and 4.012,18.35kJ/mol and 1.393 × 103, respectively.The results indicated that TVC, TVB-N, TBA and TMA value increased with the increasing of storage times and temperatures. It showed from the reliability assessment between predicted and observed shelf-life that relative error was within ＋ 10% calculated by the prediction models for the shelf-life of puffer fish.The remaining shelf-life of puffer fish could be predicted at the storage temperature from 273K to 281K based on TVC and T-VBN value.
出处
《食品工业科技》
CAS
CSCD
北大核心
2012年第6期390-393,408,共5页
Science and Technology of Food Industry
基金
上海市科委部分地方院校计划项目(08390513900)
上海市科委工程中心建设(11DZ2280300)
上海市教育委员会重点学科建设项目(J50704)
上海市教育委员会科研创新项目(11YZ160)
关键词
动力学模型
贮藏
品质控制
河豚鱼
货架期
kinetic models
storaqe
quality control
puffer fish
shelf life
