Abstract:

Total volatile basic nitrogen (TVB-N), thiobarbituric acid (TBA) and aerobic bacterial count of Trachinotus ovatus at different storage temperatures were investigated. The kinetic models of TVB-N, TBA and aerobic bacterial count were established to predict shelf life and control the quality change of Trachinotus ovatus during storage. Results indicated that TVB-N, TBA and aerobic bacterial count were increased during storage with the increase of storage time and temperature. The reaction model was first order and Arrhenius equation could be used to describe the change of TVB-N, TBA and aerobic bacterial count. The kinetic models of Trachinotus ovatus were t = (lnAt－lnA0)/(1.68×109×e-56600/RT) for TVB-N, t = (lnAt－lnA0)/(3.10×108× e-52090/RT) for TBA, t = (lnAt － lnA0)/(1.87 × 108 × e-47550/RT) for aerobic bacterial count. Therefore, the storage period of Trachinotus ovatus could be calculated using these models.

Key words: Trachinotus ovatus, volatile basic nitrogen (TVB-N), thiobarbituric acid (TBA), aerobic bacterial count, kinetic model