| 摘要: |
| 为了快速检测水产品的新鲜度,采用电导率法测定草鱼鱼肉电导率在贮藏过程中的变化规律,验证电导率作为测定鱼肉新鲜度指标的可行性。测定-3和3 ℃贮藏过程中草鱼鱼肉浸出液的电导率、菌落总数、挥发性盐基氮质量分数w(TVB-N)、硫代巴比妥酸质量分数w(TBA)和鲜度指标K随贮藏时间的变化规律;利用最小二乘法计算电导率与菌落总数、w(TVB-N)、w(TBA)、K的相关性。结果表明:草鱼在-3和3 ℃贮藏条件下的电导率、菌落总数、w(TVB-N)、w(TBA)和K均随着贮藏时间的延长而增大,且电导率与菌落总数、K、w(TVB-N)、w(TBA)相关性极显著(P＜0.01),相关系数r均大于0.960。电导率法可以作为快速判定草鱼新鲜度的有效方法。 |
| 关键词: 草鱼 新鲜度 电导率 菌落总数 |
| DOI：10.11841/j.issn.1007-4333.2011.04.024 |
| 投稿时间：2010-12-23 |
| 基金项目:现代农业产业技术体系建设专项资金资助(CARS-46) |
|
| Research on relationship between electric conductivity andfreshness indicators of Grass carp |
|
ZHANG Li-na1, LUO Yong-kang1, LI Xue1, SHEN Hui-xing2
|
| (1.College of Food Science and Nutritional Engineering,China Agricultural University,Beijing 100083,China;2.College of Science,China Agricultural University,Beijing 100083,China) |
| Abstract: |
| In order to detect the freshness of fish rapidly,electric conductivity method was applied to measure the electric conductivity changes during storage to verify its feasibility.Variations of the electric conductivity,aerobic bacterial count,total volatile basic nitrogen (TVB-N),2-thiobarbituric acid (TBA) and K value were detected during storage.And the relationship between electric conductivity and aerobic bacterial count,TVB-N,TBA and K value of grass carp (Ctenpharyngodon idellus) stored at -3 and 3 ℃ was also studied used by the least square method.The result showed that electric conductivity,aerobic bacterial count,TVB-N,TBA and K value grew with the increasing storage time.Moreover,there was good correlations between electric conductivity and aerobic bacterial count,TVB-N,TBA,K value (P＜0.01),and all the correlation coeffiecients were more than 0.960.Thus electric conductivity can be used as a rapid and effective method to detect grass carp freshness. |
| Key words: grass carp electric conductivity freshness aerobic bacterial count |
