卢涵,  罗永康,  史策,  冯力更. 0 ℃冷藏条件下鲢阻抗特性与鲜度变化的相关性[J]. 南方水产科学, 2012, 8(5): 80-85. DOI: 10.3969/j.issn.2095-0780.2012.05.012
引用本文: 卢涵,  罗永康,  史策,  冯力更. 0 ℃冷藏条件下鲢阻抗特性与鲜度变化的相关性[J]. 南方水产科学, 2012, 8(5): 80-85. DOI: 10.3969/j.issn.2095-0780.2012.05.012
LU Han, LUO Yongkang, SHI Ce, FENG Ligeng. Correlation between impedance and freshness indicators of silver carp (Hypophthalmichthys molitrix) during 0 ℃ storage[J]. South China Fisheries Science, 2012, 8(5): 80-85. DOI: 10.3969/j.issn.2095-0780.2012.05.012
Citation: LU Han, LUO Yongkang, SHI Ce, FENG Ligeng. Correlation between impedance and freshness indicators of silver carp (Hypophthalmichthys molitrix) during 0 ℃ storage[J]. South China Fisheries Science, 2012, 8(5): 80-85. DOI: 10.3969/j.issn.2095-0780.2012.05.012

0 ℃冷藏条件下鲢阻抗特性与鲜度变化的相关性

Correlation between impedance and freshness indicators of silver carp (Hypophthalmichthys molitrix) during 0 ℃ storage

  • 摘要: 为了更好地了解0 ℃冷藏条件下鲢(Hypophthalmichthys molitrix)鱼体的阻抗特性与鲜度的变化规律及相关性,建立鱼体鲜度快速检测方法,分别测定了鲢鱼片的品质指标菌落总数、肌苷和次黄嘌呤浓度总和/ATP关联物浓度总和(K值)、汁液损失、感官评价以及鲢鱼体的阻抗变化率(Q值),分析了Q值与各品质指标的相关性。结果显示,随贮藏时间的延长,鱼片的菌落总数、K值和汁液损失率逐渐增加,感官评分和鱼体的Q值逐渐减小。第15天鱼片的菌落总数为(6.850.07)log cfug-1,K值为(63.971.93)%,汁液损失率为(6.260.01)%,感官评分为10.01.4分,Q值为(22.922.60)%,此时鱼片失去食用价值。Q值与菌落总数、K值、汁液损失和感官评价的相关系数R分别为0.972、0.976、0.945和0.984(P0.01),表明Q值与各鲜度指标具有良好的相关性。在0 ℃贮藏条件下用Q值可快速、无损伤地评估鲢鲜度。

     

    Abstract: The objective of the present work was to investigate the correlation bewteen impedance and freshness indicators of silvercarp (Hypophthalmichthys molitrix) during 0℃ storage and establish a rapid method for measuring freshness of freshwater fish.We determined the freshness indicators (total aerobic account, K value, juice loss, sensory score) and impedance change ratio (Q value) to analyze their correlation. Results reveal that the total aerobic count, K value and juice loss increased whileQ value and sensory score decreased with storage time. On the 15th day, the total aerobic count, K value, juice loss, sensory score and Q value were (6.850.07) log cfug-1, (63.971.93)%, (6.260.01)%, 10.01.4 and (22.922.60)%, respectively, indicating that the fillets had lost edible value. The correlation coefficient between the Q value and total aerobic count, K value, juice loss, sensoryscore were 0.972, 0.976, 0.945 and 0.984, respectively (P0.01). Therefore, Q value is a fast and nondestructive indicator to estimate the freshness of silver carp fillets during 0 ℃ storage.

     

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