冻藏条件对速冻黑芝麻汤圆品质的影响及预测模型构建
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“十三五”国家重点研发计划项目 (2018YFD0400605)


Quality Changes and Establishment of Quality Loss Rate Prediction Model of Quick-frozen Black Sesame Tang-yuan at Frozen Conditions
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    摘要:

    以最易发生质量变化的速冻黑芝麻汤圆为研究对象,研究冻藏温度(-5,-15,-25℃)、冻藏时间(30,60,90,120 d)对其品质的影响,并根据影响品质的关键性因素构建品质损失的预测模型。通过对不同冻藏条件下汤圆的酸价、过氧化值、质构特性、失水率、亮度等指标测定,感官指标评定及皮尔逊相关性分析,结果表明:在冻藏条件下,酸价、过氧化值、失水率、硬度及咀嚼性呈上升趋势,而亮度L~*值、弹性及感官评分呈下降趋势;皮尔逊相关性分析表明,汤圆的感官评分与理化指标之间的皮尔逊相关系数均大于0.9,相关性较好,拟合精度高。不同贮藏条件下汤圆的酸价与感官评分之间的相关性呈极显著负相关(P<0.01),平均皮尔逊相关系数均大于其它指标系数,是速冻黑芝麻汤圆品质损失率预测模型的关键因素。动力学模型分析显示,速冻黑芝麻汤圆酸价变化符合一级动力学模型,通过Arrhenius方程建立其品质损失率预测模型,酸价活化能E_A为41 606.58 kJ/mol,指前因子k_0为693 842.31。在-5,-15,-25℃条件下,将所得货架期实测值与预测模型进行对比验证,结果模型预测值与实际货架期相对误差在±10%内,说明该模型可用于不同贮藏条件下黑芝麻汤圆品质损失率的预测。

    Abstract:

    The quick-frozen black sesame Tang-yuan used as the experimental materials. The effect law on the quality of quick-frozen black sesame Tang-yuan under different frozen storage temperatures (-5, -15, -25 ℃) and different frozen storage time (30, 60, 90, 120 d) were studied, key factor of influence quality changes were identified and establishment of quality loss rate prediction model. Beside the acid value, peroxide value, rate of water loss, brightness, texture properties, simultaneous sensory evaluation and verification model of quick-frozen black sesame tang-yuan were measured and analysed. The results showed that the acid values, peroxide value, rate of water loss, hardness and chewiness value under frozen conditions was increased, but brightness, springiness and sensory scores decreased. Correlation analysis showed that the Pearson correlation coefficient between the sensory and physical and chemical indicators of the Tang-yuan was greater than 0.9. There was a significant negative correlation between the acid value and sensory score under different storage conditions(P<0.01). The average correlation coefficient of other indicators was lower than the physical and chemical indicators. The key factor of the acid value in prediction model of quality loss rate of quick-frozen black sesame Tang-yuan. Kinetic model analyses were proposed that first-order reaction kinetics to describe quality determined change. Arrhenius equation was used to predict the quality loss rate model of Tang-yuan. The activation energy (EA) and rate constant(k0) of acid value was 41 606.58 kJ/mol and 693 842.31. At the temperature of -5, -15, -25 ℃ to verify the predictive modeling, the relative error between the predicted by the model and the actual value was within ± 10%. Therefore, this model can be used to predict the quality loss rate of black sesame Tang-yuan at different storage conditions.

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雷萌萌;赵蒙姣;艾志录;潘治利;黄忠民.冻藏条件对速冻黑芝麻汤圆品质的影响及预测模型构建[J].中国食品学报,2021,21(7):241-250

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  • 在线发布日期: 2021-08-12
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