Abstract: General methods of determination of freshness in aquatic Product are the determinations of TVBN,K value and plant count for bacterial colonies. TVBN is the national standard to detenrmine freshness in aquatic product. But these methods are tedious and time-comsuming. On the basis of the electrochemistry theory, the method of using electroconductivity to determine freshness in freshwater fish was studied. The reletionship between electroconductivity and TVBN was studied using silver carp as sample. The result was obtained that the electroconductivity was linearly correlated to TVBN. Correlation faCtor ρ=0. 99. Thus electroconductivity can be used as an index of freshness.

Key words: Electroconductivity Freshness TVBN Correlation