Effect of composite coating on preservation of Chinese shrimp by electronic nose detection

Chitosan, ε-polylysine and carrageenan were used to treat the Chinese shrimp, electronic nose system was used as a indicator to explore the effects of different coating treatments, the sensory evaluation and analysis of TVB-N were also provided for comparison. The results showed that electronic nose coule distinguish between different coated shrimp treatment, and the detection result was consistent with that of sensory evaluation and the analysis of TVB-N. In addition, Loadings analysis method showed that W1W (inorganic sulfide) and W2W (organic sulfide) had a large variance to the first main axis, W5S (nitrogen oxide) and W1S (hydrocarbon) had a large variance to the second main axis. The electronic nose had a good response to the odor of Chinese shrimp during storage. Therefore, the electronic nose system could be used to evaluate the freshness of Chinese shrimp.