复合生物保鲜剂结合气调包装对海湾扇贝柱冷藏保鲜效果的研究

Effects of Compound Biological Preservative Combined with Modified Atmosphere Packaging on Fresh-keeping of Argopectens irradias in Cold Storage

摘要:

本文以海湾扇贝柱为对象，采用复合生物保鲜剂及保鲜剂结合气调包装处理，测定其在（0±1）℃冷藏过程中菌落总数、理化和感官等指标的变化，评价复合生物保鲜剂结合气调包装的保鲜效果。结果表明：各处理组的挥发性盐基氮、细菌总数、感官评分、pH、Ca2+-ATPase活性变化均与贮藏时间相关（P<0.05）。空气包装组海湾扇贝柱冷藏货架期为4 d，复合生物保鲜剂处理的货架期大约为9 d；生物保鲜剂结合气调包装能够显著延长冷藏扇贝货架期，具有良好的抑菌保鲜作用，高体积分数的CO2抑菌效果较为明显，但随CO2浓度升高汁液流失严重；生物保鲜剂结合80% CO2+20% N2气调包装组冷藏贮存10 d，海湾扇贝柱的菌落总数为5.20 lg(cfu/g)，TVB-N 值为0.12 mg/g，Ca2+-ATPase活性为0.0310 μmol Pi/(mg·h)。总体结果表明，复合生物保鲜剂结合气调包装能有效延长冷藏海湾扇贝柱的货架期。

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．