茶多酚对精炼菜籽油的抗氧化作用

The Antioxmative Activity of Green Tea Polyphenols in Refined Rapeseed Oil

以“绿宝牌”茶多酚为主要成分，配制纯天然油脂抗氧化剂，应用于高级精炼菜籽油中，并同复合合成抗氧剂、α─生育酚和充氮气比较，用国标法测定油脂的过氧化值和酸值，结果证明使用量相同的条件下（０．０３％），茶多酚抗氧化剂远优于复合合成抗氧剂，能延长精炼菜籽油的保质期（ＰＯＶ≤１０ｍｅｑ／ｋｇ）三倍以上，而充氮和使用α─生育酚无明显效果。

A natural antioxidant mainly comprised of Lu Bao Brand Green Tea Polyphe-nols(GTP)was used in high grade refined rapeseed oil,and was compared with Mixed Chemi-cally Synthesised Antioxidant(MCA),α─Tocopherol,and nitrogen(N_2).The peroxide value(POV)and acidity value(AV)were estimated by China National Standard Method and it wasconfirmed that GTP prolong the assurance period of the oil(POV reaches to 10 meq/kg )3.5-fold ,superior to MCA,α─Tocopherol and nitrogen had hardly effect.