鱿鱼鲞复水过程中食用品质及水分变化动力学模型研究

Kinetic Model Study of Edible Quality and Moisture Changes During Dry Squid Rehydration

为探究纯碱联合复配磷酸盐对鱿鱼鲞品质的影响,优化鱿鱼鲞的复水条件,本试验以鱿鱼鲞为原料,研究在碱发条件下,不同质量分数(0%、0.1%、0.3%、0.5%、0.7%)的复配磷酸盐对鱿鱼鲞复水后品质特性的影响,并利用3种复水动力学模型对鱿鱼鲞复水过程进行模型拟合。结果表明,纯碱联合一定质量分数的复配磷酸盐有利于提高鱿鱼鲞的复水品质。随着复配磷酸盐质量分数的增加,复水比呈上升趋势,当复配磷酸盐质量分数为0.5%时复水比最高;在食用品质方面,鱿鱼鲞复水后的硬度、胶着性、咀嚼性和内聚性整体显著降低,而弹性变化不显著,感官品质呈先变好后变坏的趋势;鱿鱼鲞样品的a^(*)值和b^(*)值总体呈上升趋势,pH值、L^(*)值和ΔE值则随复配磷酸盐质量分数的增加而略有下降。鱿鱼鲞的水分吸收曲线符合经典物质吸水曲线,3种复水动力学模型中Peleg模型拟合度最佳,可用于描述鱿鱼鲞的复水过程,由此得出本试验鱿鱼鲞的复水动力学模型方程:M_(t)=M_(0)+t[/1.269-0.366X+(1.969-0.573X)t]。通过试验验证模型准确度,所得模型预测值和实测值吻合度较高,能较好地预测鱿鱼鲞复水时水分变化情况。本研究结果为鱿鱼鲞高值化利用提供了理论参考。

In order to investigate the effect of sodium carbonate with compound phosphate on the quality of dry squid and to optimize the rehydration conditions of dry squid,this experiment was conducted to investigate the effect of different mass fractions of compound phosphate(0%、0.1%、0.3%、0.5%、0.7%)on the quality characteristics of dry squid under lye macerating with dry squid as raw material.Three rehydration kinetic models to fit the rehydration process of dry squid were applied.The results showed that sodium carbonate with a certain mass fraction of compounded phosphate was beneficial to improve the rehydration quality of dry squid.Besides,the rehydration ratio increased with the increase of the mass fraction of compound phosphate,and the highest rehydration ratio was achieved when the mass fraction of compound phosphate was 0.5%.In terms of edible quality,the hardness,gumminess,chewiness and cohesiveness decreased significantly,while the springiness did not change significantly,and the sensory quality of dry squid after rehydration showed a tendency to become better first and then worse;the a^(*)and b^(*)values of dry squid showed an overall increasing trend,and the pH,L^(*)values andΔE values decreased slightly with increasing mass fraction of compounded phosphate.Furthermore,the water uptake curve of dry squid was consistent with the classical material uptake curve.The Peleg model had the best fit among the three rehydration kinetic models,which could be used to describe the rehydration process of dry squid.The equation of the rehydration kinetic model of dry squid was derived as follows:M_(t)=M_(0)+t[/1.269-0.366X+(1.969-0.573X)t].The accuracy of the model was verified by experiments,and the predicted and measured values of the model were in good agreement.This model can predict the moisture change during the rehydration of dry squid better and can provide a theoretical reference for future dry squid high-value utilization.