Effect of high barrier EHA/PE membrane on preservation of fresh-cut asparagus lettuce

In order to explore the effect of the high barrier packaging materials on the fleshing-keeping of freshcut lettuce,fresh-cut asparagus lettuce were vacuum packed with EHA/PE composite membrane and refrigerated at(5±2) ℃,sample without any packing as control. The total bacterial count,color,p H,drip loss,vitamin C,and sensory quality of fresh cut lettuce were tested during storage. The results showed that during the storage time,the indicators of asparagus lettuce packaged with EHA/PE were better than that of PE films(p <0.05). Without the package the sensory of asparagus lettuce were unacceptable and the total bacterial count achieved(5.91±0.12) CFU at 4 days. But samples packaged with EHA/PE multilayer film could achieve16 days and the total bacterial count only 5.69 CFU at the eighteenth day,the drip loss was inferior to 1.5% at16 days,and the VCcontent more than 5 mg/100 g all the while. The results suggested that EHA/PE film could greatly extend the shelf life.