Effects of Different Drying Methods on the Quality of Factory Instant Bacon
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摘要: 为满足腊肉工业化生产的不同需求,分别使用自然风干、热风干燥、热泵干燥三种方式干燥腊肉,比较水分活度、水分含量、出品率、酸价、过氧化值、色泽、感官、质构,并对理化指标进行主成分分析。结果表明,自然风干得到的腊肉色泽差;热风干燥得到的腊肉酸价、过氧化值、出品率最高;热泵干燥得到的腊肉水分含量和水分活度最低、色泽好、感官评分最高、硬度最小、干燥速率快。其水分活度为0.718,水分含量为18.13 g/100 g,出品率为62.20%,过氧化值为0.127 g/100 g,酸价为0.83 mg/g,色差值为12.28,感官评分为39.50分,硬度为8120.16 g。主成分分析提取了前2个主成分,累积贡献率到达100%。水分活度、水分含量、过氧化值、硬度、弹性、粘性、咀嚼性对第一主成分起作用;出品率、酸价、色差、回复性对第二主成分起作用。综合分析,热泵干燥得到的腊肉产品品质最佳,可为肉制品的工业化生产提供理论依据。Abstract: Three drying methods, including natural air drying, hot air drying, and heat pump drying were studied in this paper to meet the different needs for the industrial production of Chinese bacon. The principal components analysis (PCA) on the physical and chemical indicators was conducted by comparing water activities, moisture contents, yield ratios, acid values, peroxide values, hues, organoleptic attributes, and textures. The results indicated that the Chinese bacon obtained by natural air drying had poor color quality, while the Chinese bacon obtained by hot air drying had the highest acid value, peroxide value, and yield ratio. In addition, the Chinese bacon obtained by heat pump drying had the lowest water activity, lowest moisture content, best color quality, highest sensory score, lowest hardness, and fastest drying rate. Its water activity was 0.718, the moisture content was 18.13 g/100 g, the yield ratio was 62.20%, the peroxide value was 0.127 g/100 g, the acid value was 0.83 mg/g, the color deviation was 12.28, the sensory score was 39.50, and the hardness was 8120.16 g. By PCA, the first two principal components were extracted, and the cumulative contribution rate reached 100%. Furthermore, the water activity, moisture content, peroxide value, hardness, springiness, gumminess and chewiness contributed to the first principal component, while the yield ratio, acid value, color deviation, and resilience contributed to the second principal component. In summary, the best quality of Chinese bacon products can be obtained by heat pump drying, which can provide a theoretical basis for the industrial production of meat products.
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Key words:
- bacon /
- natural air drying /
- hot air drying /
- heat pump drying /
- quality
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表 1 腊肉感官评分标准表
Table 1. Sensory evaluation standard table of bacon
指标 标准 评分 外观(1~10分) 无白霜,无黏液,无霉点 8~10分 有少量的白霜和霉点 4~7分 发黏和有霉点,有大量白霜 1~3分 色泽(1~10分) 鲜亮有光泽,瘦肉呈鲜玫瑰红,肥肉透明或呈乳白色,皮呈棕红色 8~10分 发暗,瘦肉呈暗红色,肥肉略带黄色,皮呈黄色或微微发白 4~7分 暗淡,瘦肉呈酱黑色,肥肉发黄,皮发白 1~3分 气味(1~10分) 腊香味香味浓郁,脂肪无哈败味,无异味 8~10分 腊香味稍淡,脂肪有轻度的哈败味 4~7分 腊香味不明显,脂肪哈败味明显,或有其他异味 1~3分 质构(1~10分) 软硬适中,富有弹性 8~10分 较湿或较干,弹性一般 4~7分 过湿或过干,弹性差 1~3分 滋味(1~10分) 咸度适中,口感适宜 8~10分 咸度过咸或过淡,口感一般 4~7分 咸度太咸,口感差 1~3分 表 2 不同干燥方式对腊肉感官品质的影响(分)
Table 2. Effects of different drying methods on sensory quality of bacon (score)
干燥方式 外观 色泽 气味 质构 滋味 自然风干 4.60±1.10c 5.20±0.70c 5.70±0.80c 7.30±0.70a 7.80±0.60a 热风干燥 7.10±0.70b 7.00±0.90b 7.10±1.10b 6.70±0.90b 7.90±0.60a 热泵干燥 8.40±0.50a 8.00±0.60a 8.40±0.90a 6.80±0.90b 7.90±0.70a 注:每一列上标字母不同表示均值差异显著,P<0.05,字母相同表示均值差异不显著,P>0.05;表3同。 表 3 不同干燥方式对腊肉质构的影响
Table 3. Effects of different drying methods on bacon texture
干燥方式 硬度(g) 弹性 粘性 咀嚼性 回复性 自然风干 10395.22±
2872.2b0.236±
0.032a10394.15±
2872.05b2497.09±
957.61b0.336±
0.021a热风干燥 10514.16±
3136.9a0.245±
0.024a10514.06±
3137.53a2643.59±
974.90a0.372±
0.025a热泵干燥 8120.16±
2952.9c0.214±
0.032a8125.36±
2948.59c1799.45±
875.64c0.356±
0.018a表 4 总变异解释量
Table 4. Total variation interpretation
成分 初始特征值 总计 方差百分比(%) 累积(%) 1 7.298 66.348 66.348 2 3.702 33.652 100.000 表 5 成分矩阵
Table 5. Component matrix
分析因子 成分 1 2 水分活度 0.980 -0.201 水分含量 0.972 0.237 出品率 0.442 0.897 酸价 0.394 0.919 过氧化值 0.997 0.078 色差 0.411 -0.912 硬度 0.959 -0.282 弹性 0.999 -0.044 粘性 0.959 -0.282 咀嚼性 0.986 -0.166 回复性 0.263 0.965 -
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