Discussion on the Determination Methods of Acid Value of High-Oryzanol Rice Oil

摘要

Rice oil is commonly known as rice bran oil,and its composition of the unsaturated fatty acids is more reasonable,mainly contain linoleic acid 38％,oleic acid 42％,and the ratio is about 1∶1.1.Moreover,this ratio is in accordance with the optimum ratio of the World Health Organization recommended,and for this reason it is widely welcomed by consumers over the world.And it is currently one of the health oil on the market.In addition,the content of unsaponifiable lipid in rice bran oil is up to about 4.2％.In particular,the content of gamma-oryzanol ranks first among the edible oil.It is reported that the content of oryzanol in crude rice bran oil is varied from 2％ to 3％.The oryzanol do not dissolve in water,slightly soluble in alkaline water,soluble in a mixture of various types of fatty acids and vegetable oils,and also soluble in the mixture of fatty acids,vegetable oils and petroleum ether.