Study on the Smart Tags of Freshness of Black Carp

Abstract:

Black carp was investigated as research object in this paper. Bromcresol purple and bromothymol blue were chosen as reagents which were selected to produce smart tags. First，how smart tags indicate the freshness of fresh water fish was studied，then the effects of different masses of fish on color changes of smart tags were determined. Additionally，the effect of preservative film on indicating freshness of smart tags was investigated. Results showed that smart tag of bromcresol purple can better indicate the freshness of packaged black carp；The color of smart tag of 0.5% bromcresol purple could turn to blue when the TVBN of black carp was 20 mg/hg；Smart tag of bromcresol purple can indicate of the freshness of packaged black carp with different masses；The effect of protection film on indicating of smart tag was not significant.