Analysis of the Dynamic Decomposition of Unsaturated Fatty Acids and Tocopherols in Commercial Oils During Deep Frying

被引：17

作者：

Liu, Xiaofang ^{[1
]}

Wang, Shuo ^{[1
]}

Masui, Eitaro ^{[1
]}

Tamogami, Shigeru ^{[1
]}

Chen, Jieyu ^{[1
]}

Zhang, Han ^{[1
]}

机构：

[1] Akita Prefectural Univ, Fac Bioresource Sci, Akita, Japan

来源：

ANALYTICAL LETTERS | 2019年 / 52卷 / 12期

关键词：

Commercial edible oil; decomposition; dynamic index; polyunsaturated fatty acids (PUFAs); principal component analysis (PCA); total tocopherol (TToc); total unsaturated fatty acids (TUFAs); OXIDATIVE STABILITY; DEGRADATION COMPOUNDS; CHEMICAL-COMPOSITION; EDIBLE OILS; CHEMISTRY; FOOD; SEED;

D O I：

10.1080/00032719.2019.1590378

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The decomposition of unsaturated fatty acids and tocopherols in 10 commercial edible oils during deep frying was investigated. The dominant tocopherol in oils rich in polyunsaturated fatty acids (PUFAs) was gamma-tocopherol, except for natural perilla oil (delta-tocopherol dominant), and the main tocopherol in oleic acid-rich oils was alpha-tocopherol. The PUFA-rich oils had higher tocopherol contents than the oleic acid-rich oils. Both the reduction rate of total unsaturated fatty acid (TUFA) and total tocopherol (TToc) were linear with frying time (t). The decomposition rate of TToc is faster than that of TUFA since the slope values obtained from fitting equations (Y = k t) k(TToc) (1.520-14.483) were obviously larger than for k(TUFA) (0.155-0.270). By establishing a dynamic decomposition index, unsaturated fatty acids and tocopherol in oils showed dynamic decomposition over multiple frying cycles. The obtained results showed that decomposition characteristics of oils are related to their fatty acid compositions.

引用

页码：1991 / 2005

页数：15

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