Correlation between Water Migration and Fatty Acid Changes of Tuna during Cold Storage

Abstract

Abstract: In order to investigated the correlation between water migration and fatty acid changes of tuna during cold storage, the water changes of tuna meat tissue were analyzed by low-field nuclear magnetic resonance (LF-NMR). The results of transverse relaxation time T2 indicated that T21(trapped water) decreased, the T22 (free water) increased gradually with the storage time increasing. The results of physical and chemical indicators showed that the pH value and TBA value significantly decreased, while the Aw value and water content continuously increased, and the quality of tuna deteriorated. Correlation analysis showed that T2b was significantly correlated with C18:0 value and EPA contents (p<0.05). T21 was significantly correlated with DHA contents (p<0.01). T22 was significantly correlated with C18:0 contents, C18:1n9c contents (p<0.01, p<0.05). Therefore, LF-NMR techniques can be considered to detect the change on fatty acid of tuna during cold storage and to reflect deterioration of quality.

Key words: low-field nuclear magnetic resonance (LF-NMR), water migration, fatty acid, correlation

CLC Number:

TS254.4

Xin-yun Wang Jing XIE. Correlation between Water Migration and Fatty Acid Changes of Tuna during Cold Storage[J]. FOOD SCIENCE, 0, (): 0-0.

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