高温短时烹饪过程中葵花籽油的品质变化

Quality changes of sunflower seed oil in the high-temperature-short-time cooking process

目的考察烹饪过程中葵花籽油的品质变化规律。方法选取非重复性的短时高温烹饪方式,考察器具材质、温度、时间和食品成分对葵花籽油过氧化值、酸值和脂肪酸组成的影响。结果葵花籽油的过氧化值变化受器具材质、烹饪温度和时间的交互影响,在不锈钢锅210℃高温烹饪8 min的条件下,食品成分(水、食盐、蔗糖、大豆分离蛋白)添加对过氧化值无明显影响。烹饪条件及食品成分添加对葵花籽油酸值的影响程度偏弱,但蔗糖添加可致酸值显著增加(P<0.05)。葵花籽油主要由亚油酸(61.81%)、油酸(31.64%)、棕榈酸(2.50%)和硬脂酸(1.64%)组成,经不同条件烹饪处理后,其脂肪酸组成比例并未发生显著变化。结论作为食用油的质量评价指标,过氧化值、酸值和脂肪酸组成并不能有效反映其烹饪品质。

Objective To investigate the quality changes of sunflower seed oil in cooking process. Methods The non-repetitive high-temperature-short-time cooking model was chosen to explore the effects of utensils materials, temperature, time and food ingredients on the peroxide value, acid value and fatty acid composition of sunflower seed oil. Results The changes of peroxide value in the cooking process was interactively affected by utensils materials, cooking temperature and time. Under the cooking conditions of 210 ℃ and 8 min using a stainless steel kettle, the addition of water, salt, sugar and soy isolate protein had no significant effect on peroxide value. The effects of cooking conditions and food ingredients on the acid value of sunflower seed oil were weak, but the acid value significantly increased when cooked with sugar （P〈0.05）. The sunflower seed oil was mainly composed of linoleic acid （61.81%）, oleic acid （31.64%）, palmitic acid （2.50%） and stearic acid （1.64%）. The proportion of fatty acid composition did not change significantly after treatment with different conditions. Conclusion As the indexes of quality evaluation, peroxide value, acid value and fatty acid composition could not effectively reflect the cooking quality of edible oil.