The Combined Efficacy of Superchilling and High CO2 Modified Atmosphere Packaging on Shelf Life and Quality of Swimming Crab (Portunus trituberculatus)
2017
Sun, B. | Zhao, Y. | Yu, J. | Ling, J. | Shang, H. | Liu, Z.
The combined effect of superchilling and modified atmosphere packaging (MAP) treatment on the quality of swimming crab during storage was investigated. As a result, significantly (p < 0.05) higher inhibitor effects on total aerobic plate counts (TPCs) were observed in MAP treatments than in control (air package). Additionally, chemical analysis results showed that MAP treatments with 40–80% carbon dioxide (CO ₂) were highly effective in maintaining lower total volatile basic-nitrogen (TVB-N), trimethylamine-nitrogen (TMA-N), pH, and thiobarbituric acid reactive substances (TBARS) values in swimming crab (p < 0.05). On the other hand, the brightness (L *) results also confirmed that this combined treatment showed a positive effect on the stability of color during storage. Results also indicated that the combination of superchilling and 60% CO ₂ MAP treatment prolonged the shelf life of swimming crab to 15–20 days. However, 100% CO ₂ MAP treatment showed a negative effect on the drip loss and overall acceptability, indicating CO ₂ content should be considered as a critical factor in this promising technology.
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