不同包装材料对鲜切哈密瓜保鲜效果的影响

Fresh-keeping effects of different packaging materials on fresh-cut Hami melon

【目的】探讨不同包装材料对鲜切哈密瓜保鲜效果的影响,为鲜切果蔬产品的生产提供参考。【方法】哈密瓜去皮切成2.0cm×2.0cm×2.0cm大小的切片后,分别用PE保鲜膜(4μm)、LDPE保鲜膜(8μm)、LLDPE保鲜膜(5μm)、PVDC保鲜袋(9μm)包裹,然后放入5℃冰柜里冷藏10d;从冷藏当天开始,每隔两天检测1次样品,共检测6次。【结果】透气性差的PVDC保鲜袋较其他包装材料更有利于缓解鲜切哈密瓜褐变,有效抑制相对电导率和丙二醛(MDA)含量增加,降低维生素C损失,但不同包装材料对失重的影响不明显。【结论】保鲜膜包装材料对鲜切哈密瓜的保鲜效果有一定影响,生产中应选择透气性差包装材料作为鲜切果蔬的保鲜材料。

[Objective]The present experiment was conducted to investigate the fresh-keeping effects of different kinds of packaging materials on fresh-cut Hami melon.[Method]Hami melon fruits were peeled,cut into 2 cm3 pieces and packaged with 4 μm PE,8 μm LDPE,5 μm LLDPE and 9 μm PVDC parafilm,respectively,and then stored at 5℃ for 10 days.The packaged fruits were analyzed at 0,2,4,6,8 and 10 days after packaging.[Result]The results showed that PVDC parafilm with low gas-permeability slowed down the browning of fresh-cut Hami melon,effectively inhibited the increase of relative conductivity and accumulation of malondialdehyde and reduced the loss of vitamin C.All packaging materials did not show significant effects on weight loss.[Conclusion]Different parafilm packaging material had different fresh-keeping effects on fresh-cut Hami melon,and the parafilm with low gas-permeability may be used for fresh-keeping of fruits and vegetables.