米糠油及其脱臭馏出物中生育酚和生育三烯酚的分析检测

对米糠油及其脱臭馏出物中生育酚及生育三烯酚含量进行检测分析,结果表明,米糠来源和米糠油精炼工艺对米糠油及其脱臭馏出物中α、β、γ、δ-生育酚和生育三烯酚的含量有显著影响。米糠毛油中生育三烯酚占维生素E总量的60%～70%,脱臭馏出物中生育三烯酚占维生素E总量的25%～40%,米糠油脱臭馏出物维生素E总量中生育三烯酚的含量较米糠毛油有较大的损失。通过对米糠油脱臭馏出物不皂化物的分析检测可知,米糠油脱臭馏出物中主要甾醇的种类为豆甾醇、菜油甾醇、谷甾醇,总甾醇含量很少,仅为0.32%;除此之外,还有少量日耳曼甾醇、羊毛甾醇、3,5-二烯豆甾烷等。

Determination of tocopherols and tocotrienols in rice bran oil and the by-product deodorizer distillate

The content of tocopherols and toctrienols in rice bran oil and its deodorizer distillate were analyzed,and the unsaponifiable matters components in the deodorizer distillate were also studied.The results showed that the tocotrienols accounted for 60%-70% of the total vitamin E in crude rice bran oil,for 25%-40% of the total vitamin E in rice bran oil deodorizer distillate.The main sterol in the rice bran oil deodorizer distillate was stigmasterol,campesterol and sitosterol,but the total sterol content was only 0.32%.In addition,the deodorizer distillate contained a trace of germanical sterol,lanosterol,stigmastan-3,5-diene etc..