花生仁与核桃仁贮藏货架期的预测模型

食品科学 ›› 2012, Vol. 33 ›› Issue (14): 290-295.

花生仁与核桃仁贮藏货架期的预测模型

任斯忱，李汴生*，申晓曦，阮征

华南理工大学轻工与食品学院

收稿日期:2011-06-25 修回日期:2012-06-20 出版日期:2012-07-25 发布日期:2012-07-27
通讯作者: 李汴生 E-mail:febshli@scut.edu.cn
基金资助:
粤港关键领域重点突破项目

Predictive Modeling of Shelf Life of Peanut and Walnut Kernels during Storage

Received:2011-06-25 Revised:2012-06-20 Online:2012-07-25 Published:2012-07-27

摘要/Abstract

摘要： 采用加速贮藏试验，研究花生仁与核桃仁贮藏中脂肪氧化的动力学及其货架期预测模型。花生仁和核桃仁分别采用真空和露空两种贮藏方式贮藏于0～50℃。以过氧化值(POV)为指标，通过对不同温度下POV的测定，建立了POV与贮藏时间(t)的一级反应动力学方程以及反应速率(k)与贮藏温度(T)的Arrhenius方程；低温和真空贮藏时，氧化反应的活化能(EA)明显升高，证明低温和真空条件可延缓果仁的氧化酸败；两种贮藏方式下，核桃仁反应活化能(EA)均小于花生仁EA，表明核桃仁氧化稳定性低于花生仁。两种果仁的一级化学反应动力学模型和Arrhenius方程均具有较高的拟合精度(R2＞0.95)，建立的模型对货架期的预测值与实测值接近(RE＜10%)，表明论文得到的预测模型可快速准确的预测0～50℃条件下花生仁与核桃仁贮藏的货架期。

关键词: 花生仁, 核桃仁, 过氧化值(POV), 货架期, 动力学

Abstract: In this study, accelerated storage tests were used to explore the kinetics of lipid oxidation in peanut and walnut kernels and develop mathematical models for predicting their shelf lives. Peanut and walnut kernels were stored at 0－50 ℃ in a vacuum or atmospheric environment to measure the changes of peroxide value (POV) at 20 d intervals during storage at different temperatures (0, 20, 30, 40 ℃ and 50 ℃). A first-order reaction model between logarithmic POV and storage time (t) was fitted and an Arrhenius model of reaction rate constant (k) with respect to storage temperature (T) was established for peanut and walnut kernels, respectively. The oxidative rancidity of both kernels could be inhibited in vacuum or at lower temperature due to the increased EA; walnut kernels were more sensitive to oxidation due to having lower EA than peanut kernels. The observed high regression coefficients (R2 ＞ 0.95) and similarity between the experimental and predicted shelf lives of peanut and walnut kernels indicated the high reliability of the established first order reaction model and Arrhenius model for the prediction of shelf life during storage at 0－50 ℃.

Key words: peanut kernel, walnut kernel, peroxide value (POV), shelf life, kinetic

中图分类号:

S646.1

任斯忱，李汴生*，申晓曦，阮征. 花生仁与核桃仁贮藏货架期的预测模型[J]. 食品科学, 2012, 33(14): 290-295.

参考文献

[1] 吕巨智, 梁和, 张智猛等. 花生仁的营养成分及保健价值[J]. 中国食物与营养, 2009, (2): 50-52.
[2] 中国预防医学科学院营养与食品卫生研究所. 食物成份表[M]. 人民卫生出版社, 1998.
[3] 郗荣庭, 刘孟军. 中国干果[M]. 中国林业出版社, 2005.
[4] 刘晓丹, 谢晶. 番茄的质量因子分析及货架寿命预测[J]. 食品科技, 2006(9): 65-68.
[5] 张丽平, 余晓琴, 童华荣. 动力学模型预测板鸭货架寿命[J]. 食品科学, 2007, 28(11): 584-586.
[6] Ratchaneewan K, Waraporn B, Panuwat S. Shelf-life predictions of packaged cassava-flour-based baked product by using empirical models and activation energy for water vapor permeability of polyolefin films[J]. Journal of Food Engineering, 100(10): 461-467.
[7] Ana Giménez, Paula Varela, Ana Salvador et al. Shelf life estimation of brown pan bread[J]. Food Quality and Preference, 2007, 18(3): 196-204.
[8] Kanavouras A, Coutelieris F A. Shelf-life predictions for packaged olive oil based on simulation[J]. Food Chemistry, 2006, 96(5): 48-55.
[9] 陶菲, 郜海燕, 陈杭君等. 不同包装对山核桃脂肪氧化的影响[J]. 农业工程学报, 2008, 24(9): 303-305.
[10] 赵功玲, 路建锋, 苏丁. 三种加热方式对油脂品质影响的比较[J]. 中国粮油学报, 2006, 21(5):113-116.
[11] 王炜, 李鹏霞, 梁丽松等. 不同贮藏温度对核桃脂肪酸氧化的影响[J]. 西北林学院学报, 2008, 23(6): 159-161.
[12] 赵声兰, 李涛, 蔡绍芬等. 几种抗氧化剂对核桃油抗氧化性能的研究[J]. 食品科学, 2002, 23(2): 135-138.
[13] 郝利平, 杨剑婷. 贮藏因素对核桃脂肪酶活性与油脂酸价的响[J]. 农业工程学报, 2005, 21(5): 170-172.
[14] LABUZA T P, SHAPERO M. Prediction of nutrient losses[J]. Journal of Food Processing and Preservation, 1978 (2): 91-99.
[15] 菲尼马. 食品化学[M]. 王璋, 许时婴, 江波等. 译. 3版. 北京: 中国轻工业出版社, 2003: 849-850.
[16] LABUZA T P, FU B. Growth kinetics for shelf-life prediction: theory and practice[J].Journal of Industrial Microbiology, 1993(12): 309-323.
[17] 赵书刚, 赵悦平, 王红霞等. 核桃油脂理化特性与脂肪酸成分的研究[J]. 中国粮油学报, 2006, 54: 4705-4714.
[18] LABUZA T P, SCHMIDL M K. Use of sensory data in the shelf life testing of foods: Principles and graphical methods for evaluation[J].Cereal Foods World,1988, 33(2):193-206.