食品科学 ›› 2010, Vol. 31 ›› Issue (20): 448-452.doi: 10.7506/spkx1002-6630-201020095

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直接浸渍冷冻草鱼块冻藏过程中品质变化研究

倪明龙,朱志伟,曾庆孝   

  1. 华南理工大学轻工与食品学院
  • 收稿日期:2010-06-18 出版日期:2010-10-25 发布日期:2010-12-29
  • 通讯作者: 倪明龙 E-mail:wodeyingzi2008@126.com
  • 基金资助:

    广东省省部级海洋渔业科技推广专项(A200899103);中央高校基本科研项目(2009ZM0301)

Quality Change in ICF-treated Grass Carp Blocks during Frozen Storage

NI Ming-long,ZHU Zhi-wei,ZENG Qing-xiao   

  1. (College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China)
  • Received:2010-06-18 Online:2010-10-25 Published:2010-12-29
  • Contact: NI Ming-long E-mail:wodeyingzi2008@126.com

摘要:

探讨直接浸渍冻结(immersion chilling and freezing,ICF)对食品冻藏品质的影响。以氯化钠、乙醇和丙二醇3种组分构成的多元载冷剂为冷冻介质(溶液温度-40℃)条件下草鱼块冻藏过程中品质的变化情况,并与空气鼓风式冻结(空气温度- 40℃、风速6m/s)进行比较。结果表明:直接浸渍冻结其冻结速率是相同介质温度下空气鼓风式冻结的1.5 倍;冻结后的草鱼块中NaCl、乙醇和丙二醇的吸收量及总吸收量分别为0.14%、0.17%、0.63%、0.94%;相同冻藏条件下,直接浸渍冻结后的样品和传统的鼓风冻结后的样品相比,前者盐溶性蛋白含量高于后者,并且脂肪氧化程度、汁液流失和干耗均低于后者,直接浸渍冻结更有利于草鱼块冻藏过程中质构特性的保持。综合各指标说明直接浸渍冻结后的样品冻藏品质优于空气鼓风冻结。

关键词: 直接浸渍冻结, 草鱼块, 冻藏, 品质

Abstract:

In order to explore the effect of immersion chilling and freezing (ICF) on the quality of frozen food, the quality change of ICF-treated grass carp in multi-element aqueous solution composed of salt sodium, ethanol and glycol propylene at -40 ℃ were investigated and also compared with traditional air-blast freezing (-40 ℃, 6 m/s). Results indicated that the frozen rate of ICF exhibited 1.5-fold faster than that of air-blast freezing. The uptake amounts of sodium chloride, ethanol, and propylene glycol in grass carp were 0.14%, 0.17%, 0.63% and 0.94%, respectively. Compared with traditional air-blast freezing, ICF-treated samples had higher salt-soluble protein, less lipid oxidation, reduced drip loss and low moisture loss. Therefore, ICF exhibited more beneficial for maintaining texture properties and provided a better quality for grass carp during frozen storage.

Key words: immersion chilling and freezing, grass carp, frozen storage, quality.

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