Detection of trans-fatty acid in soybean oil heated with high temperature and analysis of physical and chemical indicators

被引：0
|
作者：
Agricultural Products Processing Research Institute, Chinese Academy of Agricultural Sciences, Department of Agriculture Agricultural Products Processing Comprehensive Key Laboratory of Beijing, Beijing [1 ]
100193, China
不详 [2 ]
100097, China
机构：
[1] Agricultural Products Processing Research Institute, Chinese Academy of Agricultural Sciences, Department of Agriculture Agricultural Products Processing Comprehensive Key Laboratory of Beijing, Beijing
[2] Beijing Research Center for Agricultural Standards and Testing, Beijing
来源：
J. Chin. Inst. Food Sci. Technol. | / 3卷 / 237-242期
关键词：
Cis-trans isomerization; Fried oil; Physical and chemical indicators; Trans-fatty acids;
D O I：
10.16429/j.1009-7848.2015.03.032
中图分类号：
学科分类号：
摘要：
The types and content of trans fatty acid (TFA) formed in heated soybean oil were detected by capillary column-gas chromatography method. TFA was comparatively analyzed with physical and chemical indicators (Acid value, Carbonyl group value and Polarity composition) of soybrean oil withdifferent heating time. Soybean oil was heated by high temperature of 220℃ with forming the large amounts of TFAs, TFA content increased from control group of 0.075 g/100 g to 5.691 g/100 g after 12 h heating, the main species were trans linoleic acid and linolenic acid. Physical and chemical indicators such as acid value, carbonyl group value and polar components significantly increased (P<0.01) with heating time extended under temperature of 220℃, but longer heating time (more than 48 h) was needed to exceed the set limit value of these indicators. While the TFA content in the 12 h of heating time was more than 2 times of the recommended limits(2 g/100 g). This study provided a scientific support for establishing limited index of TFA and its control method in edible oils heated under high temperature. ©, 2015, Chinese Institute of Food Science and Technology. All right reserved.
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页码：237 / 242
页数：5
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