The determination conditions of colorimetric method of potassium hydroxide in ethanol were studied with oryzanol in rice bran oil as subject. The precision,recovery and stability were measured to evaluate the method. The results showed that using colorimetric method of potassium hydroxide in ethanol for determining oryzanol in rice bran oil,the best solvent was chloroform or petroleum ether. When the mass concentration of oryzanol was in the range of 4-20 μg/mL,the linear correlation between mass concentrat...