生物学杂志

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三甲胺表征缢蛏贮藏过程中新鲜度变化的研究

  

  1. 宁波大学 海洋学院, 宁波 315211
  • 出版日期:2019-04-18 发布日期:2019-04-18
  • 通讯作者: 徐继林,研究员,博士生导师,研究方向为海洋生物资源利用,E-mail:xujilin@nbu.edu.cn
  • 作者简介:冉云,硕士研究生,从事海洋生物食品风味学研究,E-mail:marail@foxmail.com
  • 基金资助:
    国家现代农业产业技术体系建设专项资金项目(CARS-49);宁波市科技攻关项目(2017C110003)

Study on the freshness changes of Sinonovacula constricta during storage indicated by trimethylamine

  1. School of Marine Science, Ningbo University, Ningbo 315211, China
  • Online:2019-04-18 Published:2019-04-18

摘要: 通过顶空气相色谱-质谱联用技术测定缢蛏在不同贮藏温度和时间下的三甲胺变化情况,为缢蛏的贮藏条件提供理论依据。结果表明,在26℃常温、4℃冷藏及-20℃冷冻条件下,随着时间的加长,三甲胺总量一直呈上升趋势,降低保存温度可减缓此趋势:常温26℃条件下在水中暂养2 d的缢蛏已死亡并发出腥臭味,三甲胺含量为13.954 mg/kg;4℃冷藏条件下在水中暂养到第8天时,缢蛏完全失去活动能力,此时三甲胺含量为1.369 mg/kg;-20℃条件下冻藏30 d时,缢蛏中三甲胺含量仅为0.564 mg/kg,依然比较新鲜。可见,低温可抑制腐败微生物的生长繁殖,有利于维持缢蛏的新鲜度。

关键词: 顶空气相色谱-质谱联用, 缢蛏, 三甲胺, 贮藏

Abstract: In this study, dynamic tendency of trimethylamine (TMA)content in Sinonovacula constricta stroraged in different phases with different temperature was detected by headspace gas chromatography-mass spectrometry (HS-GC-MS), to provide evidence for the storage conditions of S. constricta. With the duration of storage time, the content of TMA had been on the rise at 26℃, 4℃ and-20℃, and the low temperature could slow down the trend. After being cultured in sea water for 2 days at 26℃, S. constricta had been dead and smelly, in which the content of TMA was 13.954 mg/kg. After being storaged in sea water at 4℃ for 8 days, S. constricta had been incapacitated and the content of TMA in it was 1.369 mg/kg. The content of TMA in S. constricta was only 0.564 mg/kg after being storaged at-20℃ for 30 days suggested that the samples remained enough freshness. So low temperature can inhibit the growth and reproduction of spoilage microorganisms, which is conducive to maintain the freshness of S. constricta.

Key words: headspace gas chromatography-mass spectrometry (HS-GC-MS), Sinonovacula constricta, trimethylamine, storage

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