Stabilization of seal blubber and menhaden oils with green tea catechins

被引:82
作者
Wanasundara, UN [1 ]
Shahidi, F [1 ]
机构
[1] MEM UNIV NEWFOUNDLAND,DEPT BIOCHEM,ST JOHNS,NF A1B 3X9,CANADA
关键词
antioxidant activity; marine oils; menhaden oil; natural antioxidants; oxidative stability; seal blubber oil; synthetic antioxidants; tea catechins;
D O I
10.1007/BF02523382
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Catechins, namely (-)epicatechin (EC), (-)epigallocatechin (ECC), (-)epicatechin gallate (ECC) and (-)epigallocatechin gallate (ECCG), were isolated from commercial Chinese green tea leaves. The antioxidant activity of isolated catechins was compared with those of a-tocopherol, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT) and tert-butylhydroquinone (TBHQ), all at 200 ppm, in refined, bleached and deodorized seal blubber oil and menhaden oil. The study was carried out under Schaal oven test conditions at 65 degrees C over a 144-h period, except for weight gain measurements, which were continued for up to 200 h. Progression of oxidation was monitored by measuring changes in weight gain and values of peroxide, conjugated diene, and 2-thiobarbituric acid-reactive substances. Oils treated with tea catechins showed excellent oxidative stability as compared with samples that contained commonly used antioxidants, such as a-tocopherol, BHA, BHT, and TBHQ. The potency of catechins in prevention of oxidation of marine oils was in the decreasing order of ECC > ECCG > EGC > EC; ECG was slightly more effective than TBHQ in systems studied.
引用
收藏
页码:1183 / 1190
页数:8
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