Effects of Compound Biological Preservative Combined with Modified Atmosphere Packaging on Fresh-keeping of Argopectens irradias in Cold Storage
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Abstract:
This article attempts to evaluate the fresh-keeping effects on Argopectens irradias, which was treated with compound preservative combined with modified atmosphere packaging (MAP), and the changes of total bacteria count (TBC), physicochemical and sensory indexes during freezing (0±1)℃ were measured. Results showed that total volatile base nitrogen (TVB-N), TBC, sensory evaluation, pH and Ca2+-ATPase activity were related to the processing period (p<0.05).The shelf-life of Argopectens irradias by air package was 4 d, while in biological fresh-keeping agents was 9 d. The combined preservative combined with modified atmosphere packaging remarkably extended its shelf period, and explored good fresh-keeping and antibacterial effects. High CO2 MAP had better antimicrobial effect, but drip loss became more serious with increasing CO2 concentration. After ten days of fresh-keeping with biological fresh-keeping agents combined with air-conditioned packing with 80% CO2 and 20% N2, total bacteria of Argopectens irradias turned out 5.20 lg(cfu/g) with TVB-N of 0.12 mg/g, and the activity of Ca2+-ATPase was 0.0310 μmol Pi/(mg·h). Thus, the combination of compound preservative and modified atmosphere packaging could effectively extend the shelf-life of Argopectens irradias during refrigerated storage．
