大豆油在油炸鸡米花过程中品质的变化

以大豆油为主要原料,鸡米花为炸制食品,通过测定大豆油的色泽、酸价、过氧化值、羰基价等理化指标,研究炸制时间、炸制温度,每批次炸制量对大豆油品质变化的影响,并且结合低频核磁共振成像(MRI)技术对理化指标进行比较验证。研究结果表明:在油炸过程中,大豆油的色泽、酸价、羰基价均随油炸时间的延长、油炸温度的升高、鸡米花煎炸量的增大而上升;过氧化值随着油炸时间延长先快速升高,再缓慢下降,随着煎炸温度的升高、鸡米花煎炸量的增加而不断增大。根据MRI比较法进行验证,随着煎炸时间的延长,低频核磁为可见明显深红色氢质子堆积,存在密集絮凝,边缘模糊,液体流动性偏差。

Study on the quality change of soybean oil in the frying process of Chicken rice

To soybean oil as the main raw material, chicken for the fried food. The effects of different frying time, frying temperature and the quality of each batch of fried chicken on the quality of soybean oil were studied by measuring the physical and chemical indexes, including color, acid value, peroxide value, carbonyl valence price and polar component of soybean oil. Moreover, the low-frequency nuclear magnetic resonance imaging (MRI) technology was used to verify the physical and chemical indicators. The results showed that the color, acid and carbonyl value of the frying oil increased with the frying time, temperature and the amount per batch; the peroxide value increased rapidly with the frying time, and then decreased slowly; the number of frying batches also increased with the frying temperature. According to the MRI comparison method, with the prolongation of the frying time, the dark red proton accumulation, dense flocculation, blurred edge, and liquid fluidity deviation were observed.