The quality changes and shelf-life of fresh-cut Iceberg lettuce treated by ultrasound and modified atmosphere packages
Fresh-cut lettuce is popular as an important ingredient of salad. However, their short shelf-life has limited the market increase them. Ultrasonic treatment and modified atmosphere packaging are effective methods for fresh-cut lettuce storage. However, the combined effects of ultrasonic treatment and modified atmosphere packaging (MAP) on fresh-cut lettuce were rarely reported. In this study, fresh-cut lettuces were treated with ultrasound with different processing order and power density, modified atmosphere package with different loading percentage, and the combination of ultrasonic and modified atmosphere packaging treatments. The quality changes, including sensory quality, weight loss rate, total soluble solids, color, firmness, chlorophyll content and ascorbic acid, and shelf-life were evaluated. It is found that the optimal condition for ultrasonic treatment combined with MAP is that the whole lettuce treated by ultrasound (power density: 12 W L‑1) for 5 min, and cut and filled in modified atmosphere package with 75% package load capacity. In this condition, fresh-cut lettuce can be stored in 4°C for 15 d.
Yu, K., Wang, K., Liu, X., Chen, X., Yu, X., Yue, F. and Chen, Y. (2021). The quality changes and shelf-life of fresh-cut Iceberg lettuce treated by ultrasound and modified atmosphere packages. Acta Hortic. 1319, 265-276
fresh-cut, lettuce, ultrasound, modified atmosphere packaging