Effects of biopreservative combined with modified atmosphere packaging on shelf-life of trichiutus haumela

In order to extend the shelf life of Trichiutus haumela under cold storage, the influences of compound biopreservative and biopreservative combined with modified atmosphere packaging on the shelf-life of Trichiutus haumela stored at (4±1)℃ were studied with air packaged product as controls. The sensory evaluation values, total viable count (TVC), total volatile base nitrogen (TVB-N), pH value, the 2-thiobarbituric acid (TBA ) and the drip loss of Trichiutus haumela were used to evaluate the fish quality during the cold storage. The results showed that the shelf-life of air packaged product was about 4-5 days; mixing biopreservative (with 1.0% Chitosan and 0.4% Tea Polyphenols) had a significant bacteriostatic activity; and the drip loss with high density CO2 treatment was higher than that with other treatments. The compound biopreservative combined with modified atmosphere packaging with 60% CO2+10%O2+30%N2 had the best fresh-keeping effect that after the Trichiutus haumela storaged at (4±1)℃ for 20 days, the values of TVC and TVB-N of Trichiutus haumela were 5.59 lg(cfu/g) and 19.39 mg/100g, respectively, which meant the sample was still at the secondary freshness and the shelf-life could be extended to 20days, which was 4 times longer than that of the blank. These conclusions can provide reference for preservation and extend the shelf life of Trichiutus haumela.