A ternary system of ?-tocopherol with phosphatidylethanolamine and L-ascorbyl palmitate in bulk oils provides antioxidant synergy through stabilization and regeneration of a-tocopherol

被引：5

作者：

Doert, Martin ^{[1
]}

Grebenteuch, Sandra ^{[1
]}

Kroh, Lothar W. ^{[1
]}

Rohn, Sascha ^{[1
]}

机构：

[1] Tech Univ Berlin, Inst Food Chem & Anal, Dept Food Chem & Anal, TIB 4-3-1,Gustav Meyer Allee 25, D-13355 Berlin, Germany

来源：

FOOD CHEMISTRY | 2022年 / 391卷

关键词：

Phospholipids; Phosphatidylethanolamine; a-Tocopherol; Ascorbyl palmitate; Synergistic antioxidant; LIPID OXIDATION; ALPHA-TOCOPHEROL; LECITHINS; INSIGHTS; IMPACT; ACID;

D O I：

10.1016/j.foodchem.2022.133084

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The stabilization of fats and oils against oxidative lipid deterioration is still a great challenge. The synergistic interaction between phospholipids, L-ascorbate, and tocopherols have not yet been comprehensively understood. The mechanism of the synergistic antioxidant effect of 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (PE) in mixtures with L-ascorbyl palmitate (AP) and alpha-tocopherol (alpha-Toc) was investigated in an ethyl linoleate model and sunflower oil at 110 C. The mixture of PE, AP, and alpha-Toc is stabilized through continuous regeneration of alpha-Toc from its oxidation product alpha-tocopherylquinone (alpha-TQ). This reaction is catalyzed by acids and proceeded through the formation of the alpha-tocopherone ion (T+) as an intermediate product. In addition to the direct reduction of T+ by AP, PE can also cause regeneration indirectly by reacting with dehydroascorbyl palmitate (DHAP) or other tricarbonyl compounds to form amino reductones. PE and AP undergo an amino-carbonyl reaction to form the condensate PE(AP)2.

引用

页数：10