| 食品物料冻结点测定方法研究 |
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| 引用本文： | 宋丽荣,陈淑湘,林向东.食品物料冻结点测定方法研究[J].食品科学,2011(Z1). |
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| 作者姓名： | 宋丽荣 陈淑湘 林向东 |
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| 作者单位： | 海南大学食品学院;海南大学海洋学院; |
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| 基金项目： | 海南大学09年度重点科技项目(hd09xm34); 海南大学“211”建设资助项目 |
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| 摘 要： | 通过对多种食品物料冻结过程中电导率的测定,研究了电导率、温度和时间三者的关系,发现当物料温度降至0℃以下某温度时,其电导率会出现急剧下降的现象。而突变点的温度与用传统的温度测定方法所得冻结点的数值相吻合,证明电导率发生突降时的温度即为物料的初始冻结点,从而可建立一种食品物料冻结点测定的新方法。并通过此方法研究了富士苹果冻结点温度与水分含量、可溶性固形物(SSC)的关系,通过建立数学模型可以根据可溶性固形物含量或水分含量,确定富士苹果的冻结点温度。结果表明:富士苹果冻结点温度与水分含量呈高度正相关,其回归方程为Y=0.5611X-51.761;冻结点温度与可溶性固形物含量呈高度负相关,其回归方程为Y=-0.5565 X+3.1001;可溶性固形物含量与水分含量呈高度负相关,其回归方程为Y=-0.9995X+97.821。
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| 关 键 词： | 冻结点 电导率 温度 时间 |
Research on determination of freezing point of food materials |
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| SONG Li-rong CHEN Shu-xiang LIN Xiang-dong.Research on determination of freezing point of food materials[J].Food Science,2011(Z1). |
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| Authors: | SONG Li-rong CHEN Shu-xiang LIN Xiang-dong |
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| Affiliation: | SONG Li-rong1 CHEN Shu-xiang2 LIN Xiang-dong1(1.College of food science,Hainan University,Haikou,570228,China,2.Ocean College of Hainan University,China) |
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| Abstract: | According to determine the conductivity of food materials,this experiment research the relationship between electric conductivity,temperature and time during the freezing process,we found that the conductivity will sharply drop when the temperature lowed to some temperature below zero.And comparative with the traditional freezing point determination method,we found that the freezing point is the temperature when the conductivity will sharply drop,so provides a new method to detect the freezing point of food... |
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| Keywords: | freezing point conductivity temperature time |
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