Effect of Modified Atmosphere Packaging on the Shelf-life of Fresh-cut Chinese Cabbage
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Abstract:
The combination of the packaging bags with the modified atmosphere windows of different permeability and areas were studied for extending the shelf life of fresh-cut Chinese cabbage. The sensory quality and gas composition in the packaging bags were analyzed in order to screen the optimum modified atmosphere packaging (MAP) of fresh-cut Chinese cabbage. The results showed that the optimum MAP could effectively improve the storage quality of fresh-cut Chinese cabbage. The suitable modified atmosphere window for fresh-cut Chinese cabbage was as follows: the transmittance rates of O2 and CO2 were 4×105 and 1.6×106 cm3/m2·d·atm respectively, the permeability ratio was 1:4, and the area of Chinese cabbage needed was 1~2 cm2/kg, which can solve the problem of odor, and can maintain shelf quality for more than 4 days. Compared with the permeability of modified atmosphere window and film, the permeability amount of O2 and CO2 in packaging bags suitable for fresh-cut Chinese cabbage should be 1.85×103~2.08×103 and 8.59×103~9.51×103 cm3/kg·d·atm respectively, and O2 was 3.63%~5.10% and CO2 was 7.77%~8.07%,when the appropriate gas concentration was reached. The MAP bag not only can make fresh-cut Chinese cabbage in the appropriate gas state, but also can solve the odor problem caused by anaerobic breathing, retain the original smell of fresh-cut cabbage, and prolong its shelf life, so as to provide strong technical support for fresh-cut enterprises.
