翡翠贻贝气调保鲜包装研究

Study on the Modified Atmosphere Packaging of Green Mussels(Perna Viridis)

采用涂布聚偏二氯乙烯的聚酯与聚乙烯复合薄膜袋(KPET/PE)气调包装翡翠贻贝,混合气体包括:CO2、O2和N2。选用5组气体配比(A:V(75%O2)/V(25%N2);B:V(50%O2)/V(50%N2);C:V(20%O2)/V(30%CO2)/V(50%N2);D:V(10%O2)/V(50%CO2)/V(40%N2);E:空气)进行包装并贮藏在5℃以下。在贮藏期间测定包装袋内气体浓度变化、需氧菌总数、TVBN和pH值,研究在不同气调比例包装条件下,翡翠贻贝的品质变化。实验结果表明:在贮藏温度为5℃条件下采用气调包装的样品,其需氧菌总数和TVBN等指标明显优于空气对照组。在5组气体比例中,以V(O2)∶V(CO2)∶V(N2)=10%∶50%∶40%的配气比例包装的保鲜效果最佳,其贮藏期比对照组空气包装延长3￣8d。

Fresh Green Mussels （Perna Viridis）were inserted in MAP with high-barrier film （KPET/PE）bags under the modified atmosphere packaging and were stored at 5℃. The combination of gases used for MAP were A：75%O2/25% N2;B：50%O2/SO%N2;C.20%O2/30%CO2/50%N2;D：10%O2/50%CO2/40%N2;E：air,respectively. Studies of concentration of gases,total aerobic counts,TVBN and pH parameters detailed these changes to evaluate the qualifies of the mussels in MAP. The results demonstrated that the mussels in MAP were obviously much fresher than those in air at 5℃. It also indicated that the optimum combination of gases for mussels was 10%O2/50%CO2/40%N2 and its shelf-life was 8 days.