Analysis of Triglycerides of Cold Precessed Tea Seed Oil

The fatty acid composition of tea seed oil was detected by using Gas Chromatography.It was found that tea seed oil contained unsaturated fatty acid up to 80%,the major of which were oleic acid and linoleic acid.By the method of pancreas lipase hydrolysis,the Sn-2 position fatty acid was analyzed and the triglycerides composition of tea seed oil were calculated according to 1,3-random-2-random distribution doctrine.The key triglycerides were found as OOO,OOL,POO,PLO,LLO and PPO.Among them,the content of three saturated fatty acid esters was 53.5%,and the content of three saturated fatty acid ester content was only 0.05%.Through HPLC and Rancimat determination,vitamin E content of the tea seed oil was found as 0.18 mg/g and the duration of the oxidation stability at 110 ℃ was 6.02 h.