Abstract:

In order to explore the effect of polyamide/polyethylene (PA/PE) composite membrane on the quality maintenance
of fresh-cut stem lettuce, fresh-cut slices of asparagus lettuce were vacuum packaged with PA/PE composite membrane and
refrigerated at 4 ℃ and those not packaged with the composite membrane under the same storage condition were used as
blank control. The total bacterial count, color, pH, drip loss, vitamin C, and sensory quality of fresh-cut asparagus lettuce
were evaluated during storage. The results showed that the shelf life of fresh-cut asparagus lettuce packaged with PA/PE membrane
was 24 days, while that of the blank control was only 4 days. Thus, PA/PE composite membrane combining with vacuum
packaging technology could extend the shelf life of fresh-cut asparagus lettuce obviously during refrigerated storage.

Key words: packaging, PA/PE, fresh-cut, asparagus lettuce